Traffic congestion and delay are characterized by slower
speeds, longer trip times, and increased queuing. They are the indicators of
traffic demand that is greater than the available capacity of the road network. These
exacerbated by various land use and infrastructure investment decisions that do not
promote the most efficient use of the transportation network
Daily person hours of delay is calculated by determining the difference
between the estimated travel time under actual (often congested) conditions and under uncongested conditions, for each highway segment and each hour of the day. These hourly delays per vehicle are multiplied by the annual average hourly traffic for each hour, and summed to get total daily vehicle hours of delay. They can then be multiplied by the vehicle occupancy to get total person hours of delay.
The Strategic Intermodal System (SIS) is a statewide network of high-priority transportation facilities where focusing investments produces the greatest impact on commerce and economic competitiveness..
Of Florida's 12,116 centerline miles of State Highway System, 4,295 are designated as SIS. The SIS carries 56 percent of the daily vehicle miles traveled in 2014.
Congestion and Delay trends are shown on the website using
the following indicators: statewide delay on SIS, delay on SIS in the 7 largest counties (Miami-Dade, Broward, Palm Beach, Hillsborough, Orange, Pinellas, Duval), and percentage of centerline miles congested on FIHS with change in
population and lane miles.
The source of this data is the Florida Department of Transportation's (FDOT) Highway Data Source
Book. The FDOT publishes this source book
yearly. This indicator has a one year lag time.
To learn more about these topics visit: http://www.dot.state.fl.us/planning/statistics/sourcebook
For further information on this topic contact:
Highway Statistics Manager
Transportation Statistics Office, Mail Station 27
Florida Department of Transportation
605 Suwannee Street
Tallahassee, Florida 32399-0450
Telephone: (850) 414-4730
Fax: (850) 414-4878