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Calculation Method
TxDOT created the car-space method to calculate the space between cars in 1-mile increments, factoring:
- Number of lanes
- Annual average daily traffic (AADT)
- Percentage of trucks
- Average car length
The calculated space between cars is categorized to illustrate levels of congestion.
Peak Hour On-System Congestion Maps, Tables and Graphs
| Base Year | ZIP |
|---|---|
| 2019 |  |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| Forecast Year | ZIP |
|---|---|
| 2039 | |
| 2038 | |
| 2037 | |
| 2036 | |
| 2035 | |
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Austin, Texas 78701