Quiz: How Traffic Works

Estimated Completion Time
1 min
True or false? Many factors can contribute to traffic congestion, but the most basic explanation is that the number of drivers trying to use the same road is so high that it goes beyond the road's capacity to handle the cars.
TRUE
Many factors can contribute to traffic congestion, but the most basic explanation is that the number of drivers trying to use the same road is so high that it goes beyond the road's capacity to handle the cars. How Traffic Works
FALSE

Advertisement

Which of the following statements is true?
City planners have a significant impact on how traffic congestion is addressed.
Civil engineers have a significant impact on how traffic congestion is addressed.
All of the above
City planners, civil engineers, environmental advocacy groups, homeowner associations, politicians and the general population can have a significant impact on how we address traffic congestion. How Traffic Works

Advertisement

True or false? A traffic wave occurs when cars slow down, and the slowing trend continues backward -- like a domino effect. As long as there are more cars approaching from behind, the traffic congestion travels in a wave.
TRUE
As more cars enter a crowded road, drivers have to use their brakes to avoid collisions, creating a traffic wave. A traffic wave occurs when cars slow down, and the slowing trend continues backward -- like a domino effect. As long as there are more cars approaching from behind, the traffic congestion travels in a wave. How Traffic Works
FALSE

Advertisement

True or false? In general, you can divide up the contributors of traffic into two broad areas: network overload and traffic disturbances.
TRUE
In general, you can divide up the contributors of traffic into two broad areas: network overload and traffic disturbances. How Traffic Works
FALSE

Advertisement

True or false? If there are highways or surface streets that suffer from heavy traffic congestion, no matter what the actual road conditions might be, they fall into the category of network overload.
TRUE
If there are highways or surface streets that suffer from heavy traffic congestion, no matter what the actual road conditions might be, they fall into the category of network overload. These are the bottlenecks and traffic snarls where demand always outweighs capacity. How Traffic Works
FALSE

Advertisement

True or false? Only accidents and breakdowns are considered traffic disturbances.
TRUE
FALSE
Accidents and breakdowns, road construction and repair, and harsh weather conditions are all considered traffic disturbances. You can't always predict where these disturbances will occur, but they still heavily impact traffic flow. How Traffic Works

Advertisement

True or false? According to the 2007 Urban Mobility Report from the Texas Transportation Institute, traffic incidents account for between 52 and 58 percent of the delays motorists experience [source: TTI].
TRUE
According to the 2007 Urban Mobility Report from the Texas Transportation Institute, traffic incidents account for between 52 and 58 percent of the delays motorists experience [source: TTI]. How Traffic Works
FALSE

Advertisement

True or false? Ramp metering ensures that cars are only allowed to enter the highway at timed intervals.
TRUE
Ramp metering ensures that cars are only allowed to enter the highway at timed intervals. This is done by placing a light similar to a traffic signal at the end of the ramp. Cities using ramp metering report a travel-delay reduction of 29.4 million hours annually with a significant decrease in traffic accidents -- yet capacity on the highway actually increased when ramp metering was introduced [source: TTI]. How Traffic Works
FALSE

Advertisement

True or false? High-occupancy vehicle lanes, or HOV lanes, are reserved for cars with a certain number of passengers (usually two or three people per car).
TRUE
High-occupancy vehicle lanes, or HOV lanes, are reserved for cars with a certain number of passengers (usually two or three people per car). Drivers have an incentive to carpool, reducing the total number of cars on the highway. Some HOV lanes have exclusive off-ramps, reducing the need to merge with other traffic. How Traffic Works
FALSE

Advertisement

True or false? Auto-restricted zones prohibit drivers from turning at specific intersections or points on a road, channeling traffic into alternate routes.
TRUE
FALSE
Turn prohibitions disallow drivers from turning at specific intersections or points on a road, channeling traffic into alternate routes. How Traffic Works

Advertisement

You Got:
/10
Comstock/Thinkstock
Featured