PE Transportation Exam with 100%
Correct Answers
Density = - ANS-flow rate [vphpl] / speed [mph]
Time mean speed - ANS-average speed of vehicles passing on a road
space mean speed - ANS-average speed of all vehicles occupying a given section of
highway
spacing - ANS-distance between common points on successive vehicles [ft / veh]
headway - ANS-time between successive vehicles [sec / veh]. measured between
common reference point
headway = - ANS-(3600 sec/hr) / v
headway = - ANS-spacing / S
jam density - ANS-density at 0 speed
AADT = - ANS-total yearly volume / 365
Directional Factor - ANS-peak dir hourly vol / 2 way hourly volume
to find density you must find: - ANS-LOS
Simple Hori Curve - ANS-arc of a circle is tangential
Compound Hori Curve - ANS-2 or more simple curves with varying radius
Reverse Hori Curve - ANS-2 circular arcs center opp.
Spiral Hori Curve - ANS-varying radius
Startup loss time for a traffic signal - ANS-2 sec
Pedestrian walk pace - ANS-3.5 ft/sec
? Freeway / Multilane Hwy - ANS-HCM Vol 2 Ch 12
