TTE4804 HW_6_Spring11

# TTE4804 HW_6_Spring11 - Course: Homework No.: Due Date: TTE...

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Course: TTE 4804/5805—Highway Geometric Design Homework No.: Six Due Date: Tuesday, March 22, 2011 PROBLEM #1 A two-lane highway (two 12-ft lanes with negligible shoulders) has a posted speed limit of 60 MPH, and on one section, has both horizontal and vertical curves as shown in the figure below. A recent daytime accident involving a vehicle undertaking a passing maneuver resulted in a fatality and a lawsuit alleging that the 60 MPH posted speed limit was unsafe speed for the curves in question and a major cause of the accident. Evaluate quantitatively the following: (a) the adequacy of the horizontal passing sight distance, (b) the adequacy of the roadway horizontal curvature, (c) the adequacy of the vertical curve, and (d) if the accident occurred in a very rainy weather with the possibility of water ponding, is the curve adequately designed for drainage? L= 500' BVC Vertical Profile Sta. 20 + 50 PVI EVC

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2 PROBLEM #2 An equal tangent vertical curve was designed in 2004 (using 2004 AASHTO design guidelines) for desirable stopping sight distance (SSD) at a design speed of 45 mph to connect grades
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## This note was uploaded on 10/29/2011 for the course TTE 4804 taught by Professor Moses during the Spring '11 term at FSU.

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TTE4804 HW_6_Spring11 - Course: Homework No.: Due Date: TTE...

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