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Types of Studies

The TimeMark system performs all of the following traffic studies.  Depending on how it was laid out and recorded, a road tube file can usually be analyzed for several different kinds of information.

Volume
How much traffic was there?  When was the peak hour?  Axle Volume studies will give you an estimate using a volume factor or average number of axle per vehicle.  Vehicle Volume gets rid of the estimates and figures out which vehicle each strike came from.  This gives you more accurate results when the traffic is a mix of vehicle classes.

Axle Classification
Different vehicle classesFind out what kind of traffic uses a route and when.  VIAS comes with a 13-category classification scheme that can be used for reporting vehicle classification data to the U.S. Federal Highway Administration (FHWA).  Only need to compare the number of passenger vehicles to trucks?  Use different classification tables on the same data to tailor the information to your audience.

Speed
See how fast each vehicle was going or just find the average free-flow speed.  VIAS does both vehicle and one-sensor speed studies.  Either kind of study gives you statistics like the pace range, minimum and maximum speeds, and percentiles.  These are calculated from the individual vehicle speeds, not interpolated, so they won't change if you group the results in different ways.

Gap
Crosswalk questionGap studies are often used to decide if a traffic control device is needed at a location.  Is there enough time for a pedestrian or car to cross the road and how often will they get the chance?  To see how long the gaps are, use a Vehicle Gap or Axle Gap binned study.  For a traffic warrant analysis, the Axle Gap Count study counts gaps using the “adequate size” you specify.

Per Vehicle
Examine the details of every vehicle that was detected.  When did it go by?  Which lane was it in?  What kind of vehicle was it?  How fast was it going?  Filters let you examine just the traffic you want such as speeding vehicles or commercial trucks.

IntersectionIntersection Turning Movement
This is a manual count study.  One or more people use an Epsilon or Epsilon NT counter to count or classify vehicles as they travel through an intersection.  Certain button combinations can be assigned for counting pedestrians.  Vehicle peak hour volume information is also available.

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