Traffic Terms
Which term describes the minimum distances drivers must have to perceive hazards and react?
Stopping Sight Distance (SSD)
Which publication provides capacity and Level of Service (LOS) analysis methods?
Highway Capacity Manual (HCM)
A bottleneck occurs when which condition exists?
Demand exceeds capacity
Why does UMass have a "Joint" Transportation Organization?
Combines ITE, WTS, and more under the same organization so transportation events are under one "roof"
WTS
Women's Transportation Seminar
Which concept tests the speed of traffic when density is zero?
Free-Flow Speed
This manual specifies the standards by which traffic signs, road surface markings, and signals are designed, installed, and used.
MUTCD
This is the speed used to determine vertical and horizontal alignments on a highway
Design Speed
This highway in this city is the widest in the United States, with 26 lanes at its widest point
Katy Freeway, Houston, Texas
ITE
Institute of Transportation Engineers
The time difference between one point on a vehicle in front and the same point on the vehicle behind it
Headway
What is the AASHTO Green Book primarily used for?
Geometric design of highways and streets, including sight distance and alignment.
How is Level of Service defined for signalized intersections?
The average control delay per vehicle, rated from A (best) to F (worst).
What is the share of total carbon emissions that the transportation sector produces in the United States?
~28% (+/- 5% acceptable)
HCM
Highway Capacity Manual
Qualitative measure used to relate the quality of motor vehicle traffic service. Used to analyze roadways and intersections.
Level of Service (LOS)
On a two-lane road, this is the only sign which can be placed on the LEFT side of the road.
No Passing Zone
If traffic density doubles and speed remains constant, how does flow rate change?
Double (x2)
The fare card used on buses and trains in Boston is called the CharlieCard/CharlieTicket - who is "Charlie?"
Character from the 1948 song "Charlie on the M.T.A.," who gets stuck abroad the train because he can't pay the conductor the extra 5 cents to exit.
MUTCD
Manual on Uniform Traffic Control Devices
What describes a traffic signal that initiates a change in operation when vehicles arrive at the intersection?
Actuated Signal
The signaling standard associated with a commonly used traffic signal controller was developed by which organization?
NEMA controller
The elevation of the Point of Vertical Intersection (PVI) is always ______ than the highest point on a crest vertical curve
Higher
How many cars were destroyed in the production of the 1980 film "The Blue's Brothers?"
~103 cars (+/- 5 acceptable)
AASHTO
American Association of State Highway and Transportation Officials