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The primary elements of traffic flow are?

The average walking speed used is ________ ft/sec when elderly pedestrian population is higher than 20%.

One of the goals of a transportation engineer is to create the most efficient and cost-effective system, while assuring that the environment is not compromised or destroyed?

Determine the horsepower produced by a passenger car traveling at a speed of 60 mi/h on a straight road of 8% grade. Assume the weight of the car is 4,000 lb. and the cross sectional area of the car is 36 ft2.

From the projects below, which one is considered a long-term (long range) project as per urban transportation planning time horizons?

During perception-reaction time, there are four sub-processes through which a driver evaluates and reacts to a stimulus. The sub-process where the driver decides what action to take in response to a stimulus is called?

The value of the goods moved by truck comprises about _________ of the total value of all goods moved in the U.S.

In a Transportation Planning Organization (TPO), the committee that is comprised of elected or appointed officials and acts as a board of directors for transportation projects is called?

The principal elements of a highway cross section consist of:

A crest vertical curve is to be designed to join a +4% grade with a -1% grade at a section of a two-lane highway. Determine the minimum length of the curve if the design speed of the highway is 70 mph, S < L, and a perception reaction time of 2.5 sec.  The deceleration rate for braking is 11.2 ft/sec2. (Please show all work as best as possible and type out anything that you would like to clearly articulate)