Transportation Engineering

Use this for “Traffic at 40 pc/km/ln and 2667 pc/h/ln meets a queue at 100 pc/km/ln and 1667 pc/h/ln. How fast does the back of the queue move?”

Use this for “A lane carries 2667 pc/h/ln at a density of 40 pc/km/ln. Find the mean headway, the mean spacing and the speed.”

Use this for “A curve on a 100 km/h highway is banked at e = 0.08 with side friction f = 0.12. What is the smallest radius it may have?”

Use this for “Two tangents meet at a PI with a deflection of 30°, joined by a 400 m radius curve. Find L, T and E.”

Use this for “A +3% grade meets a −2% grade on a 100 km/h road with SSD = 183.1 m. How long must the crest vertical curve be?”

Use this for “Trucks with a 100 kN single axle cross a road 500 times a day. By the fourth-power rule, how many 80 kN ESALs does it carry in 20 years?”

Use this for “A signal loses L = 12 s each cycle and its critical flow ratios add to Y = 0.6. Find Webster’s optimum cycle.”