Civil Engineering PE Transportation and Traffic Engineering 2

Question 1

A signalized intersection has a cycle length of 90 seconds, green time of 45 seconds, and yellow of 4 seconds. What is the effective green ratio (g/C)?

Accepted Answer

0.54

Answer

0.50

Answer

0.49

Answer

0.46

Question 2

According to HCM, the peak hour factor (PHF) for a road with a peak hour volume of 1,200 vph and a peak 15-minute volume of 350 vehicles is:

Accepted Answer

0.86

Answer

0.82

Answer

0.78

Answer

0.91

Question 3

On a freeway with FFS = 70 mph, the speed-flow curve under HCM methodology begins to break down at a flow rate of approximately:

Accepted Answer

2,400 pc/h/ln

Answer

1,800 pc/h/ln

Answer

2,000 pc/h/ln

Answer

1,500 pc/h/ln

Question 4

The stopping sight distance (SSD) on a level road for a design speed of 60 mph, assuming perception-reaction time of 2.5 s and deceleration of 11.2 ft/s², is closest to:

Accepted Answer

570 ft

Answer

645 ft

Answer

490 ft

Answer

720 ft

Question 5

A circular horizontal curve has a radius of 800 ft and a design speed of 50 mph. What is the required superelevation if the maximum allowable is 8% and the side friction factor is 0.14?

Accepted Answer

e = 5.4%

Answer

e = 7.2%

Answer

e = 8.0%

Answer

e = 3.8%

Question 6

The American Association of State Highway and Transportation Officials (AASHTO) minimum design radius for a rural arterial with design speed 70 mph and maximum superelevation 8% is approximately:

Accepted Answer

2,040 ft

Answer

1,500 ft

Answer

2,800 ft

Answer

1,200 ft

Question 7

Which traffic control device is used to assign right-of-way at intersections where signal control is not warranted, based on MUTCD guidelines?

Accepted Answer

YIELD sign

Answer

Advisory speed sign

Answer

Route marker

Answer

Warning sign