Traffic Center: Is a Geographical Information System (GIS) application
that displays statistical information about the traffic congestion and crashes in
the city of Tallahassee.
Driver Information Center: Is a Geographical Information System
(GIS) application that displays information that can help with the daily commute.
Level Of Service (LOS): A qualitative measure describing operational
conditions within a traffic stream and motorists' perceptions of those conditions.
For example, LOS A represents free flow, almost complete freedom to maneuver within
the traffic stream. LOS F represents forced flow, more vehicles are attempting to
use the freeway than can be served resulting in stop and go traffic.
Volume-to-Capacity ratio (V/C): The ratio of flow rate to capacity.
The V/C may be the actual or projected rate of flow on a designated lane group during
a peak 15-minute interval divided by the capacity of the lane group. The V/C ratio
is a measure of capacity sufficiency, that is, whether or not the physical geometry
provides sufficient capacity for the subject movement. Low V/C ratios depict relatively
free flow conditions. High V/C ratios depict more congested conditions. Actual V/C
ratios are calculated from vehicle count data (defining volume) and the geometrics
of a roadway (determining capacity). V/C ratios are used to broadly define problem
areas on a freeway and to make preliminary operational decisions concerning the
freeway (e.g., ramp metering rates). In some cases, the V/C ratio is used to define
Level of Service.
Crashes: Crashes displayed on the map are reported by Tallahassee
Police, Leon County Sheriff, Highway Patrol, and other law enforcement agencies.