# Forging new generations of engineers - PowerPoint PPT Presentation

1 / 24

Forging new generations of engineers. Road Design. A Process for Road Layout. Road Design. Check the existing Topographical data. Road Design. Decide on the type of road and characteristics Freeway Arterial Collector Feeder. Road Design.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Forging new generations of engineers

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

#### Presentation Transcript

Forging new generations of engineers

• Check the existing Topographical data

• Decide on the type of road and characteristics

• Freeway

• Arterial

• Collector

• Feeder

Setting up a chart for survey data and control points

Transit Line

Setting up the 90° Intersection

• Plan the Start of the Curve (PC)

Layout the Curve

Curve information

Knowns

R=300’

∆=33°34’

Now Calculate the Unknowns about the curve.

To find the distance from P.C. to P.T. use the formula

Convert 33°34’ to degrees

34’/60’=.567

33°34’ =33.567°

Back to the Formula

L=175.756’

Finding the angle of the 100’ chord (D)

Bisect the angle to create a Right Triangle

Inverse SinX=9.594°

D=2(9.594°)

D=19.1881°

D=19°11’

Continue laying out the road and points

To create the vertical profile of the road, lines are dropped from the station points and an exaggerated vertical scale is created. Elevation data from existing station points are plotted to a graph.

A line is plotted through the points. The line is then smoothed and parabolic transitions are added between slopes.

Vertical information is transferred back to the control points.

• Freeway: A road with limited access that generally handles between 1,000-1,300 cars per hour per lane.

• Arterial: Roads that carry between 400 to 800 cars per lane per hour depending on businesses,  parking, signs, and control signals.

• Collectors: Local roads that can generally carry 100-250 cars per lane per hour.

• Feeder: Local streets, Cul-de-sacs, or loops that service neighborhoods.