Lecture 3 - Highway Engineering by Dr.Abdul Sami

8/3/2019 Lecture 3 - Highway Engineering by Dr.Abdul Sami

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HIGHWAY PLANING

LECTURE 3

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HIGHWAY ACTIVITIESHIGHWAY ACTIVITIES


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2 . ACTIVITY

2 . Existing or projected futuretravel demands exceedavailable capacity, and accessto transportation and mobilityneed to be increased(capacity ).

http://www.ens-newswire.com/ens/sep2002/2002-09-19-06.asp


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3 . ACTIVITY

3. The route is experiencing aninordinate number of safetyand accident problems thatcan only be resolved throughphysical, geometric changes(safety ).

http://www.ems.ucla.edu/traffic/ta10.htm


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4 . ACTIVITY

4 . Developmental pressuresalong the route make areexamination of the number,location, and physical design of access points necessary(access ).


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Highway Planing

Highway Planning is the aspect of Highway engineering thatdeals with

Selection of the best path between two destinations .

A good selection of rout will balance operational efficiency,comfort, safety, convenience, cost, environmental impact,

and aesthetics .

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Criterion for the Selection of best rout.

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Criterion for the Selection of best rout.


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Basic Principles for Hwy Location

There are an infinite number of ways to get frompoint A to point B.selecting the best path between two points is calledHighway locationRoadway elements (curvature, grade, etc) must beconnected with each other to design a road thatprovides for the easy flow of traffic, while meetingdesign criteria and safety standards.

Garber and Hoel, 2002


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Factors Considered in the Selection of the best rout

Topography

Social and demographic characteristics (including land usepatterns)

Terrain and soil conditions



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Factors Considered in the Location Process

Directness of route

Serviceability of route to industrial and population areas

Crossing of other transportation facilities (roads, railroads,rivers)

Intersect other roads at right angle



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Environmental Animal habitat

Location of recreational, historic and archeologicalsites

Noise, air, and water pollution



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Economic Construction Maintenance costs

Road user costs Road user benefits (i.e. travel time) Adverse effects such as dislocation of people or

businesses


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Lecture 3 - Highway Engineering by Dr.Abdul Sami