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Travel
Time Studies
Travel time studies are widely used to document congestion and to quantify the actual impact of highway improvements. Most travel time study techniques involve using probe vehicles. These techniques are conceptually very simple, but their implementation tend to be quite labor intensive. Normally two technicians are required in the vehicle: one of them to drive the vehicle, and the other one to record distance driven and the location and time the vehicle passes predetermined checkpoints. Nowadays, distance measuring instruments (DMIs) can be used to automatically record distance, time, and speed.
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