Exam for engine

Q62. By using daily and monthly expansion factors, future raw traffic count can be adjusted to estimate AADT. If the April ADT for a road is 3078 and the AADT for the road is 3419, what is the April expansion factor?

Q63. The MUTCD requires that a “STOP HERE ON RED” sign be used when the stop line is offset from the intersection by more than:

Q64. On a freeway with a flow rate of 3,000 vehicles per hour and a space mean speed of 60 mph, what is the density of traffic flow?

Q65. How is Space Mean Speed (SMS) defined?

Q66. When designing a curve on a road with a design speed of 70 mph, a maximum superelevation rate of 6%, and a side friction factor of 0.10, what is the minimum radius that can be used for this design speed?

Q67. What is headway in the context of traffic flow?

Q68. A 16-hour traffic counts, usually 6 am-10 pm normally accounts for what percentage of daily traffic on a roadway?

Q69. Using the following Travel time study data, what is the average travel speed for the 2.75 mile route?
Travel Time Study Data
Test Run | Travel Time
1 | 5 min. 40 sec.
2 | 6 min. 10 sec.
3 | 7 min. 0 sec.
4 | 5 min. 0 sec.
5 | 7 min. 20 sec.
6 | 5 min. 30 sec.

Q70. What does traffic demand represent?

Q71. For a signalized intersection, the ITE procedure recommends a yellow change interval based on a perception- reaction time of 1 second and a deceleration rate of 10 ft/s². For a 45 mph approach with a 60-foot intersection width, what is the minimum yellow change interval?

Q72. What is the basic equation for uninterrupted flow in traffic engineering?

Q73. A roadside slope is considered “recoverable” if it is equal to or flatter than:

Q74. For a lane group with two lanes on an approach to a signalized intersection, if the adjusted saturation flow rate is 1,700 vehicles/hour/lane and the effective time is 30 seconds out of a cycle length of 80 seconds, what is the capacity of the lane group?

Q75. A signal coordination plan for five intersections spaced 1,320 feet apart aims for a progression speed of 40 mph. What is the optimal cycle length to achieve two-way progression?

Q76. The U.S. Manual on Uniform Traffic Control Devices specifies that warning and guide signs used for temporary traffic control in incident management situations may have a black legend with what color background?

Q77. What is the maximum superelevation rate that AASHTO recommends for locations where snow and ice condition prevail?

Q78. Which of the following is NOT true about Road Safety Audits?

Q79. A project was awarded at a lump sum price of $2 million with 10% retainage. The construction is 95% complete and substantially complete. The amount the owner should retain is nearly:

Q80. A “short term stationary” temporary traffic control zone occupies a location for: