TTE4804 Quiz_3_Spring11

TTE4804 Quiz_3_Spring11 - unsafe speed for the curves in...

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Page 1 of 3 Course: TTE 4804/5805—Highway Geometric Design Date : Thursday, March 3, 2011 Task: Quiz #3 Name: _____________________ Instructions This is a 15-minutes closed-book, closed-notes quiz. Please present your work neatly and legibly. PROBLEM A two-lane highway (two 12-ft lanes with negligible shoulders) has a posted speed limit of 50 MPH, and on one section, has both horizontal and vertical curves as shown in the figure below. A recent daytime accident (driver traveling eastbound struck a stationary roadway object) resulted in a fatality and a lawsuit alleging that the 50 MPH posted speed limit was
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Unformatted text preview: unsafe speed for the curves in question and a major cause of the accident. Page 2 of 3 1.1 Evaluate the adequacy of horizontal sight distance 1.2 Evaluate the adequacy of the roadway horizontal curvature ( use f max = 0.14) Page 3 of 3 1.3 Evaluate the adequacy of the vertical curvature. ================================================== FORMULAS G) g a .( V Vt . SSD ± + = 30 47 1 2 ) ( 15 max max 2 min f e V R + = L S A S S L L S S AS L > ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + − = < + = 5 . 3 400 2 5 . 3 400 2 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − = R 28.65S Cos 1 R M...
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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 Quiz_3_Spring11 - unsafe speed for the curves in...

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