User`s Manual of Web-Based Roadway Geometry Design
Contents
1. FreeWRL Open VRML Cosmo Player Technical Support Please contact Chen Fu at cliao umn edu for any technical problem with the ROAD software Please feel free to comment and report any error at http 128 101 111 90 forum index php Firefox is a product of Mozilla Corporation http www mozilla com Java is developed by Sun Microsystems http jjava sun con Cortona VRML client is a product of ParallelGraphics VRML Virtual Reality Modeling Language http www web3d org Safari is a product of Apple Computer Inc http www apple com 2 of 24 Roadway Online Application for Design ROAD PARTI Tutorial This purpose of this tutorial is to provide a step by step guidance for new users through a simple roadway geometry design of a two lane highway using scanned digital contour map as background Note Please install the software first by following the instruction mentioned in the previous section 1 Import contour map First go to the roadway geometry design website http 128 101 111 90 Lab_Mod RoadDesign html and click on Click Here to Start Roadway Design button to begin with horizontal geometry design A sample contour map Lab5Map jpg is available for download at the bottom of the above website Use Import Contour function under the File menu bar to locate the saved image file and click on Open to load the image file as background The contour map should look like the picture as shown in Figure 1 Horizontal Ge2. Stopping Sight Distance SSD is calculated using the formula stated in reference 2 pp 57 y2 SSD l V xt 29 G Where SSD is the stopping sight distance in ft m V is the initial vehicle speed in ft s m s g is the gravitational constant 32 3 ft s s 9 807 m s s a is the deceleration rate in ft s s m s s G is the roadway grade for uphill for downhill in percentage 100 and tis the perception reaction time in second Crest Vertical Curve Design calculated using the formula stated in reference 2 pp 60 For SSD lt L For SSD gt L Where US Customary Metric _ Ax SSD _ Ax SSD 2158 658 US Customary Metric L 2x SSD gt L 2x SSD 2 SSD stopping sight distance in ft m L minimum length of vertical curve in ft m and A absolute value of the differences in grades G G expressed as a percentage Sag Vertical Curve Design calculated using the formula stated in reference 2 pp 64 For SSD lt L For SSD gt L Where US Customary Metric Ax SSD me Ax SSD 400 3 5x SSD 120 3 5x SSD US Customary Metric L 2x SSD OAS L ayx 959 120 3 3x SSD SSD stopping sight distance in ft m L minimum length of vertical curve in ft m and A absolute value of the differences in grades G G expressed as a percentage 22 of 24 Roadway Online Application for Design ROAD Horizontal Curve Radius Where
3. 4 b will pop up if it does not meet the minimum radius requirement Click on the left mouse and drag the curve circle to a relatively close location where the curve will be constructed Construct two curves as shown in Figure 5 Note The curve circle does not need to be placed exactly tangent to the lines A curve alignment tool will be discussed and used in next section to automatically compute the tangent points and align the curve with the lines Horizontal Geometry Design File Edit Yiew Settings Tool Help 7 E a Aa Tee F 4 i e z 2 P Figure 5 Construct horizontal curves circles 6 of 24 Roadway Online Application for Design ROAD 4 Use the alignment curve tool to compute the curve and line tangent points To perform horizontal curve alignment first use the pointer tool from the toolbar to select design segments by clicking on the AS icon Select a circle and two lines with which the software will compute the tangent points The selected elements will be highlighted as shown in Figure 6 2 Geometric Design a O x File Edit View Settings Tool Help Slafale Nfols ealef O P U T NA ra L j N Status Curve Tool Error Figure 6 Select horizontal alignment elements 7 of 24 Roadway Online Application for Design ROAD Secondly use the align curve tool under the tool menu after 2 lines and 1 circle are selected highlighted Tangent points will then be calculated and selected
4. curve will be translated to conjunct the tangent points as shown in Figure 7 Select the modify end point tool and use right mouse click on a tangent point to delete tangent pair point Use the unselect all option from the edit menu to unselect all elements or click on the selected item again to unselect the item And follow the same steps as previously mentioned to complete the 2 curve tangent points Geometric Design ee 0 x File Edit View Settings Tool Help Tangent Point i Status Select Segment Error 139 401 Scale o Figure 7 Horizontal curve alignment 5 Place stations landmarks and enter elevation data After finishing the horizontal curve alignment the stations landmarks on the horizontal design can thereafter be placed by using the landmark tool Currently the digital contour map consists of no digital elevation data Users have to manually place stations landmarks and elevation data on existing tangent points start and end points and every contour line that intersects with the road geometry design Use the landmark tool to locate a station from start A to end B point and enter the elevation of the station sequentially Warning if stations landmarks are not placed sequentially the final design and road length will be incorrect After placing all stations and entering corresponding elevation info the road geometry design will look similar to Figure 8 b with stations landmarks 8 of 24 Roadway Onl
5. local disk drive Version 0 2 17 Apr 21 2006 Add file delete function in horizontal design 4 21 06 Version O 2 2 May J 2006 Update contour image resolution amp scale with corresponding unit selection Update horizontal design curve radius amp elevation data with corresponding unit selection Include unit info while saving vertical curve file Automatically convert vertical curve data to corresponding unit selected Version 0 2 35 duly 1 2006 Add mass diagram view feature in vertical curve design Vereion 0 2 lt 42 Oct LU 2006 Add min grade input Change image scale and map scale from integer to float Allow users to modify vertical curve length O 24 of 24
6. optional Finally use the 3D animation icon 4 to create 3D view of the road design as shown in Fi sure 14 Several viewpoints are generated automatically in the 3D road geometry model Use the view button TONNS in the VRML client application to select different view of a vehicle is driving at design speed If the animation toolbars does not display automatically right click on the animation and choose Preferences Check Show toolbars in the Appearance group under General tab Please refer to Cortona user s guide http www parallelgraphics com developer products cortona help for more info on navigation in Cortona It might take a few minutes to create 3D models on Mac machine using Safari browser For Mac users with Safari browser press control key and click on the 3D scene then choose show toolbars to display toolbars as shown in Figure 14 15 of 24 Roadway Online Application for Design ROAD Road Design Software Mozilla Firefox oe Oj x Fie Edit View Go Bookmarks Tools Help Highway Design Lab 3D Animation Crested amp Waintaived Oy Cher Fa Liao ola twin eda iPS tahoratory Center For frarsoonatian Sivotes University of Minresote ir ite aide of difrculiy tes aogertunity Albert Einstein Read 128 101 111 90 Figure 14 Road design 3D animation in VRML Note Some browsers for example Mozilla Firfox will not display the local animation
7. Roadway Online Application for Design ROAD User s Manual of Web Based Roadway Geometry Design Roadway Online Application for Design ROAD http 128 101 111 90 Lab_Mod RoadDesign html Version 0 2 4 October 9 2006 Click Here to Start Roadway Design By Chen Fu Liao Intelligent Transportation Systems Laboratory UNIVERSITY OF MINNESOTA CENTER FOR TRANSPORTATION STUDIES ITS instirutre www itslab umn edu 1 of 24 Roadway Online Application for Design ROAD Introduction There are many geometric elements involved in roadway geometry design The key elements of roadway alignment are the most important components of geometric design Detailed discussions are available in the A policy on geometric design of highways and streets 2004 1 published by AASHTO Students traditionally use pencil and ruler to conduct roadway geometry designs over contour maps Manual calculations of stopping sight distance minimum turning radius and curve alignments are required for each geometric design to ensure safety minimize economic and environmental impacts and minimize construction costs minimum land cut and fill The calculation and design process of roadway geometry design are often cumbersome and time consuming This online roadway geometry design tool was developed to assist students conducting the geometric design of roadways on computer screen using a contour map in the background as reference This software tool will all
8. Use View Cut Fill Profile icon for cut and fill plot The cut and fill profile based on the design vertical curve can also be displayed by clicking on the fill cut icon from the toolbar as shown in Figure 12 a The zero line in the cut and fill profile represents the proposed vertical curve design Lines above zero means cut elevation higher than design vertical curve and lines below zero requires fill elevation lower than designed curve Maximum cut and fill specified in the design settings screen Figure 2 are also plotted for references Click on the Data button at the upper right corner of the graph to view the fill and cut data and save it to a text file Tips Clear vertical curves edit clear curves before modifying PVI points Use left mouse to click and drag the PVI point to a desired location 12 Use View Mass Diagram icon for mass diagram display The mass diagram is available by clicking on the view mass diagram icon ve from the toolbar as shown in Figure 12 b Users can click on the Data button at the upper right corner of the mass diagram display to view the mass diagram data and save it to a text file Vertical Curve Design File Edit View Tool Help gaz 1864 2796 3r 20 4660 55972 6524 T456 Distance mfi Status View Mass Diagram Figure 12 b Mass diagram 14 of 24 oadway Online Application for Design ROAD 13 Use report icon to review final road design Use the rep
9. Ve e ge f E R v R radius defined to the vehicle s travel path in ft m f coefficient of side friction V vehicle speed in ft s m s g is the gravitational constant 32 3 ft s s 9 807 m s s and e number of vertical ft m of rise per 100 ft m of horizontal distance Vertical Curve PVC PVC amp PVI calculation The general form of the parabolic equation as applied to vertical curves is Where y ax bx c G G 2L b G a y roadway elevation at distance x from the beginning of the vertical curve in ft m x distance from the beginning of the vertical curve in stations or ft m c elevation of the point of vertical curvature PVC in ft m G initial roadway grade in percent it is as referred as the initial tangent grade G final roadway tangent grade in percent 23 of 24 Roadway Online Application for Design ROAD Revision Log Version 0 1 Mar 14 2006 Release Windows NET version Version 0 2 Apr 04 2006 Release web based version Fix metric unit display error in Design Settings screen Fix 3D animation error when choosing metric unit Fix vehicle speed to reflect design speed in 3D animation Fix horizontal curve setting scaling factor error when updating image resolution and map scale Add edit clear curves and allow PVI modification in vertical curve design Add file save report in vertical curve design for saving report to
10. data we View Mass Diagram Click on the mass diagram button from the toolbar to display the mass diagram along the roadway design Use Data button to view mass diagram data U Create Report Click on the report button to show read geometric design report including horizontal vertical curve information and cut and fill volume information Menu bar File menu Save Report Save design report txt to a disk file Print Send report to a printer Close Close report screen 3D Animation Click on the 3D animation button to generate a 3D model of the road design Animation of a vehicle driving at design speed and several view points are available to examine the road design in 3D VRML model During the 3D animation the vehicle location X Y and Elevation is generated from the 3D scene and plotted over the horizontal geometry design window and the vertical curve design screen in real time References 1 A policy on geometric design of highways and streets Chapter 3 Design elements 2004 AASHTO 2 Mannering F L Kilareski W P and Washburn S S Principles of Highway Engineering and Traffic Analysis 3 edition John Wiley amp Sons Inc 2005 3 Ames A L Nadeau D R and Moreland J L VRML 2 0 Source Book 2 edition John Wiley amp Sons Inc 1997 21 of 24 Roadway Online Application for Design ROAD APPENDIX The following equations are used in the roadway geometry design software
11. eds the grade limit as specified in the design setting screen Figure 2 To end the vertical curve construction simply double click the left mouse button or use the end icon tool from the toolbar A designed construction line example is displayed in Figure 10 PVI points can be modified by clicking on a PVI point of vertical intersection 4 point and drag the mouse to a desired location Vertical Curve Design File Edit View Tool Help Sera Scena fase ITS Institute University of Minnesota E as LL 1864 2796 3720 4660 5597 6524 T456 Distance ft Status Status Grade construction tool OFF Figure 10 Vertical curve construction lines 9 Use compute PVC PVT icon for vertical curve calculation Click on the vertical curve computation icon 5H from the toolbar to calculate the vertical point of curvature PVC O and the vertical point of tangency PVT of each vertical curve The PVC PVT and PVI point of vertical intersection points are identified on the graph with different marker If PVT and PVC of adjacent curves overlap an error message will display as shown in Figure 11 a Clear current design and redesign a new vertical curve Computed sample vertical curve is displayed in Figure 11 b 11 of 24 Roadway Online Application for Design ROAD 2 Construct PVC PVT Adjacent curves and 2 overlap Please redesign vertical curves Figure 11 a Vertical curves overlap Ver
12. file due to Java security reason User can manually open the html file under c for Windows HD for Mac and user home directory for Linux system For IE users go to Tools gt Internet Options gt Security Click on Trusted sites and add http 128 101 111 90 to the trusted sites Uncheck the Require server verification https for all sites in this zone The 3D animation window should pop up automatically by clicking on the 3D animation icon on the vertical curve design screen 16 of 24 Roadway Online Application for Design ROAD PART II Roadway Geometry Design Tools 1 Horizontal Geometry Design Menu bar File menu Open Design Open existing design file from disk drive Save Design Save current design to a disk file Close Design Close current design and clear background contour image Import Contour Load contour image file Print Send current design to a printer Exit Exit and close application Edit menu Undo Undo last line curve segment or landmark design point Redo Redo last line curve segment or landmark design point Delete Select line curve segment using pointer tool and choose file delete to delete selected line or curve Clear Landmarks Clear all horizontal station landmarks Clear All Clear all horizontal road design and associated landmarks Unselect All Unselect selected line curve segments View menu Reset Reset background image scale to 1 1 Zoom in Zoom in the contour image scale by 0 1 Zoom
13. from the toolbar to increase the zoom scale by 0 1 or use the mouse wheel forward to zoom in Q Zoom out Click on the zoom out icon from the toolbar to decrease the zoom scale by 0 1 or use the mouse wheel backward to zoom out Move Translation Choose the move translation tool to move the background contour image N Line Select the line tool to construct horizontal lines Click on left mouse to start construction line and drag the mouse to an end point and release mouse button to end construction line D Curve Select the curve circle tool to construct horizontal curve lines A curve radius window will be displayed for radius input Use left mouse and drag the curve to a desired location on the map Edit Curve T EJ Radius W000 eft Ok Cancel Figure 17 Edit curve radius 18 of 24 Roadway Online Application for Design ROAD s Modify Select the modify tool to edit the end points of a line or adjust the curve circle location by dragging the line end marks or curve center point 9 Landmark Select the horizontal landmark tool and use left mouse button to locate or add a station and enter corresponding elevation data Use the right mouse button to edit elevation data of an existing landmark station Tips The stations landmarks of the road design need to be placed sequentially from starting station to the last station Stations should be placed on all points that contour curve and road curve intersect Tangent
14. ine Application for Design ROAD Tips The stationslandmarks of the road design need to be placed sequentially from starting station to the last station Stations should be placed on all points that contour curve and road curve intersect Tangent point of curve and line segment should also be included When placing a station landmark near by a line and a curve please make sure the selected location of the station landmark belongs to the correct line curve segment in the elevation data entry window as shown in Figure 8 a Select the modify end point tool and use right mouse click on a tangent point to delete tangent pair point Edit Station 21 Elevation tt 1485 0 Delete Line Segment 296 0 C Curve Segment 9410 C Tangent Point Figure 8 a Enter landmark elevation data Horizontal Geometry Design File Edit View Settings Tool Help Figure 8 b Place stations or landmarks with elevation data 9 of 24 Roadway Online Application for Design ROAD 6 Save horizontal geometric design The horizontal geometry design is now completed Choose the file menu and save design option to save the horizontal road design 7 Vertical alignment After the horizontal geometric design vertical curve design can be conducted to ensure continuous grade variation for safety and comfort Stopping sight distance and curve length will be calculated using the formula suggested in the AASHTO manual Further discussion on the equat
15. ions used is included in the Appendix Click on the vertical alignment icon tool from the toolbar to open the vertical alignment window as shown in Figure 9 The previously entered elevation information of each station is plotted versus the calculated road distance from the starting station based on the horizontal design Click on the elevation landmark on the graph to view its location and elevation information Click on the line segment to view the grade information Vertical Curve Design F Y Station Landmark E is LL gaz 1864 27 46 3720 4660 5597 6524 T456 Distance it Status Etro Figure 9 Elevation profile of stations landmarks 8 Use the grade construction tool to design vertical curve construction lines Figure 9 display the raw elevation profile based on the horizontal location of each designed stations landmarks Click on the grade construction icon from the toolbar to place vertical curve construction lines Please use 10 of 24 Roadway Online Application for Design ROAD first station landmark as the beginning of the vertical curve design and use the last station landmark as the end of vertical curve design To construct lines click and release the left mouse to place a construction point A blue line will be drawn as the mouse moves over the graph Construction line will be placed when next construction point is placed Note The color of the vertical construction line will change to RED if it exce
16. ometry Design File Edit View Settings Tool Help Figure 1 Load digital contour map After importing a new contour map a setting screen as shown in Figure 2 a can be accessed through Road Design option under Settings menu to specify the road design settings including unit speed limit grade limit maximum cut and fill and so on The scanned contour map parameters image resolution and map scale can also be specified by clicking on the Contour Image option under the Settings menu Figure 2 b Please leave the settings as default for the tutorial example and click OK to close the design settings window 3 of 24 R oadway Online A lication for Design ROAD Design Settings General Speed Limit Reaction Time Max Cut Deceleration Max Fill 16 0 Friction Coef lo3 Max Grade 50 Side Friction Coef 0 13 Min Grade 05 Minimum Vertical Curve Length 5600 t Minimum Horizontal Cue Radius 500 0 ji Maximum Superelevation Road Design eel Road Color Edit v Shoulder Width Landmark Station Unit Road width 2 Lanes Lane Width Marker Size 2 0 Pixels US Customary Marker Color Edit Figure 2 a Road design settings Contour Imag amp Eg Image Rosolution 28 0 pixeltcr Wap Scale OOK _cancet Figure 2 b Contour Image settings 2 Use the line tool to place horizontal construction lines After design settings and contour map parame
17. on data 3D Animation Generate 3D animation view Tool menu Grade Construction ON Turn on vertical curve construction tool Grade Construction OFF Turn off vertical curve construction tool Align Vertical Curves Perform vertical curve alignment Edit Curve Length Edit vertical curve length Help Instructions User s manual About software information Cortona VRML Client Info about VRML client Tool Icon A Start Vertical Curve Construction Select the construction tool to place vertical curve construction lines Click on the first station as the start point and the last station as the ending point Stop Vertical Curve Construction Use the stop construction button or double click on left mouse to end vertical curve construction line design a Vertical Curve Calculation Click on vertical curve calculation icon to calculate vertical point of curvature PVC vertical point of tangency PVT vertical point of intersection PVI and the curve parabolic function based on equal tangency design _ Edit Vertical Curve Length Use the edit vertical curve length icon to modify the vertical curve length DA View Elevation Profile 20 of 24 Roadway Online Application for Design ROAD Click on elevation profile button to view elevation profile and vertical curve design a View Fill and Cut Profile Click on fill and cut profile button to view the fill and cut curve based on the vertical curve design Use 4 to view fill cut
18. ort icon U to create design report as shown in Figure 13 Road Design Report z e O x Road Design Report Vertical Alignment Summary Total road length 6958 639 f 1 31 79241 miles Gradetli 2 427192 75 Gradece 0 97 22216 Grades 6 6146564 Grader 1 9649 758 Gradefai 6 19702753 Curves Location and Elevation Cuvel Length 288 7371 tt PYCidistance elevation 2317 9797 1396 6066 ft PYlidist prj elevation 2454 2666 1400 35 f PYTidistance elevation 2606 7668 1401 78279 ft Max Blevation distance elevation 2606 7668 1401 7826 tt Curve Length 298 55835 tt PYCidistance elevation 3069 3418 1406 2173 ft PY Ifdist_pri elevation 3215 4001 1407 75 ft PYTidistance elevation 3367 9001 1416 2625 ft Min elevationidistance elevation 3062 9001 1406 21 73 ft Cuei Length 329 60254 tt PYCidistance elevation 4136 9297 1459 5557 f P itdist_pri elevation 4302 7334 1466 75 tt P Tidistance elevation 4466 532 1465 4987 ft Max Blevationidistance elevation 4380 966 1466 3479 f Curveld Length 466 87695 f PYCidistance elevation 5430 424 1446 1351 f PYilidist prj elevation 5669 667 1441 6167 tt PYTidistance elevation 5897 301 1453 4469 f Min elevationidistance elevation 5567 561 1444 8 862 f 4 E Figure 13 Report of roadway geometry design 14 Use the 3D animation icon to view your road design in 3D
19. out Zoom out the contour image scale by 0 1 Station Landmarks View designed landmark station elevation data View Station Data T el x Elevation 1340 0 2 em Mesane haet mor 4 5 130 236 588 038 1380 0 487 951 483 048 478 609 Figure 15 View landmark data Station Landmarks Menu bar File menu Save Data Save landmark data txt to a disk file Print Send landmark data to a printer Close Close view station landmark screen Settings menu Road Design Specify road design setting parameters Contour Image Enter contour image resolution and scale Tool menu Create Line Line tool 17 of 24 Roadway Online Application for Design ROAD Create Curve Curve tool Modify End Point Adjust end point tool Set Station Set station landmark tool Align Curve Horizontal curve alignment by selecting 2 lines and 1 curve Properties Display line or curve segment properties Help Instructions User s manual About ROAD software information Toolbar AS Arrow pointer Choose the arrow pointer tool and left mouse click to select line and or circle segments for horizontal curve alignment Color of selected item will change to the complimentary color The complementary colors are the colors which are directly opposite from one another on the color wheel as shown in the following figure Click on the selected segment again to unselect the item Figure 16 Complimentary color ring a Zoom in Click on the zoom in icon
20. ow students to design the geometry of a roadway more efficiently and effectively Furthermore students have the option to visualize the final roadway design in a 3D virtual reality environment Getting Started System Requirements Mozilla Firefox web browser http www mozilla com firefox road design software was tested using Firefox ver 1 5 Or Safari Ver 2 0 http www apple com macosx features safari or later tested on Mac OS X Ver 10 4 5 1 System Requirements Operating system with Java Plug in 1 5 0_06 or later http java sun com 2 Hardware Requirements Pentium 133 MHz or faster with 256 MB RAM or higher 3 Additional Software Requirements Cortona VRML Client is free for personal and non commercial use Cortona VRML Client is a fast and highly interactive Web3D viewer that is ideal for viewing 3D models on the Web A set of optimized 3D renderers guaranties the best visual quality on both PCs with the latest video cards and those with more basic video card capabilities Cortonal VRML client cortvrml exe is available for manual download and installation at Windows http www parallelgraphics com products cortona download netscape Installation tips can be found at http www parallelgraphics com products cortona download netscape tips Macintosh http www parallelgraphics com products cortonamac download VRML Plugin http cic nist gov vrml vbdetect html Linux FreeWRL OpenVRML Octaga Macintosh Cortona
21. point of curve and line segment should also be included When placing a station landmark near by a line and a curve please make sure the selected location of the station landmark belongs to the right line curve segment in the elevation data entry window as shown below Edit Station 18 Elevation tt 1435 0 C Line Segment C Cure Segment Tangent Point Figure 18 Edit station data QD Refresh Click on refresh button to redraw the design on the screen Vertical alignment Click on the vertical alignment button to proceed to the vertical alignment window using the horizontal design 19 of 24 Roadway Online Application for Design ROAD 2 Vertical Curve Design Use left mouse to click on the elevation landmark on the graph to view its location and elevation information Click on the line segment to view the grade information Menu bar File menu Load Vertical Curve Load existing vertical curve design Save Vertical Curve Save current vertical curve design to a disk file Print Send current vertical curve design to a printer Close Close vertical curve design screen Edit menu Undo Undo last vertical curve design Redo Redo last vertical curve design Clear Design Clear all vertical curves and construction lines Clear Curves Remove vertical curves only View menu Elevation Profile View vertical curve design profile Fill Cut Profile View cut and fill profile Mass Diagram View mass diagram Stations View stati
22. ters are set we are ready to place construction line for the roadway geometry design Click on the N icon from the toolbar and move the mouse to a desired starting point for example point A on the map Click on the left mouse and drag it to a desired end location A line linear roadway will be drawn when dragging the mouse on the map A horizontal construction line will be plotted when releasing the left mouse button For this tutorial please construct three lines from point A to point B on the map as shown in Figure 3 4 of 24 Roadway Online Application for Design ROAD Horizontal Geometry Design File Edit View Settings Tool Help Figure 3 Construct linear horizontal roadways 3 Use the curve circle tool O to locate the curve where 2 construction lines intersect Next use the curve tool for horizontal curve design by clicking on the icon fro the toolbar A window allowing for curve radius input will pop up around the upper right corner of the screen as shown in Figure 4 a Curve Settings E Ed Radius 110 0 ft Check Minimum Padius Figure 4 a Curve setting input 5 of 24 Roadway Online Application for Design ROAD Check Minimum Radius Design radius greater than Iminimurm radius 562 8216 OKI Figure 4 b Check minimum curve radius Enter the desired radius for example 600 of the curve before you click on the left mouse over the contour map A message as shown in Figure
23. tical Curve Design Fil ITS Institute University of Minnesota Y Station Landroark A PY O Py PUT E as LL gaz 1864 2796 3r 20 4660 5597 6524 T456 Distance ft Status Save vertical curve Error Figure 11 b Vertical curve design 10 Use Edit Curve Length icon for vertical curve modification To modify the individual vertical curve length click on the toolbar icon ot or select the Edit Curve Length option under Tool file menu Vertical curve edit screen will be displayed as shown in Figure 1 1 c Select desired curve modify its length and click Save button to update the curve length Use Check Min Len button to compute minimum vertical curve length based on the formula recommended by AASHTO green book as shown in Appendix Modified vertical curve will be updated on the screen as soon as mouse was placed over the vertical curve design 12 of 24 Roadway Online Application for Design ROAD Edit Vertical Curve Curve Length tt w 545 0 Stop Sight Distance Save 305 0 f Check Min Len Done Figure 11 c Edit Vertical Curve Length Vertical Curve Design Fill Cut Profile Wax Cut Fill Lirit Cut Fill Curve d tl e LL gaz 1864 2796 3720 4660 55972 6524 T456 Distance ft Status View Fillflut Protile Error Figure 12 a Cut and fill profile 13 of 24 Roadway Online Application for Design ROAD 11
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