Civil Engineering PE Transportation and Traffic Engineering 5

Question 1

A freeway weaving section has a weaving volume of 1,200 vph and a non-weaving volume of 3,000 vph. The volume ratio (VR) used in HCM weaving analysis is:

Accepted Answer

0.286

Answer

0.400

Answer

0.250

Answer

0.167

Question 2

A highway curve has a posted advisory speed of 35 mph. A truck with a center of gravity height of 6 ft and track width of 8 ft negotiates the curve. The rollover threshold lateral acceleration is:

Accepted Answer

0.67g

Answer

0.75g

Answer

0.50g

Answer

0.80g

Question 3

The MUTCD requires that a 'School Speed Limit' sign be used only when the speed limit applies during specific times. Which beacon type is typically used with school speed limit assemblies?

Accepted Answer

Flashing yellow LED beacon

Answer

Red flashing beacon

Answer

Green steady beacon

Answer

White strobe beacon

Question 4

The AASHTO flexible pavement design uses the Structural Number (SN). If layer coefficients are a1=0.44, a2=0.14, a3=0.11, drainage coefficients m2=m3=1.0, and layer thicknesses D1=4 in, D2=6 in, D3=8 in, the SN is:

Accepted Answer

3.48

Answer

4.12

Answer

2.96

Answer

5.20

Question 5

Speed studies on a road yield the following 85th percentile speed: 52 mph. The posted limit is 45 mph. Based on the 85th percentile rule, the engineer would recommend:

Accepted Answer

Raising the speed limit to 50 mph

Answer

Keeping the limit at 45 mph

Answer

Lowering the limit to 40 mph

Answer

Conducting a volume study

Question 6

A pedestrian crossing has a walk phase of 7 s and a pedestrian clearance interval of 20 s. The crossing width is 60 ft. The minimum pedestrian clearance time required by MUTCD for a walking speed of 3.5 ft/s is:

Accepted Answer

17.1 s

Answer

14.3 s

Answer

20.0 s

Answer

12.5 s

Question 7

In the four-step travel demand model, the step that converts trip productions and attractions into origin-destination trip interchanges between zones is called:

Accepted Answer

Trip distribution

Answer

Trip generation

Answer

Mode choice

Answer

Traffic assignment