Combination Truck Tonnage
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Combination truck tonnage refers to tons of freight carried by combination trucks on Florida’s SHS. This value is calculated using WIM weight measurements and permanent count stations. Quantifying how much freight weight is moved through the road network can help in two ways: first, it shows the economic activity experienced in the state around the movement of goods; and second, it captures an important driver of wear and tear of Florida’s roads.

Methodology

Methodology: Combination Truck Tonnage

Combination truck tonnage captures the total freight weight in tons shipped by combination trucks (classes 8-13). This measure uses Weigh-In-Motion (WIM) stations to obtain an average truck weight by class, and Telemetered Traffic Monitoring Sites (TTMSs) to account for all trucks traveling in the state. Since a truck may pass through more than one counter, this measure seeks to eliminate duplicate counts using TTMS clusters and number of unique trips by district pairs.

Calculation

`"Combination Truck Tonnage" = "∑Unique Combination Truck Counts" × "Average Weight of Freight"`

Reporting Periods

  • Peak Hour
  • Peak Period
  • Daily
  • Yearly
Definitions

Definitions: Combination Truck Tonnage

  • Combination Trucks: Trucks with vehicle classification from 8 to 13.
  • Combination Truck Factor: Represents the proportion of heavy vehicles that are combination trucks (Classes 8-13).
  • Combination Truck Tonnage: Combination truck tonnage captures the total freight weight in tons shipped by combination trucks (classes 8-13)
  • Freight: Goods being transported from one place to another
Download Data

Date of last refresh: 01/19/2024

SOURCES

FDOT Transportation Data and Analytics Office - Telemetered Traffic Monitoring Sites
FDOT Transportation Data and Analytics Office - Weigh-in-Motion Data
FDOT Transportation Data and Analytics Office - Traffic Characteristics Inventory
FDOT Forecasting and Trends Office - Statewide Travel Demand Model