Previous Updates to the National Highway System

MAP-21 (2012) added over 5,000 miles to the State network.
In the summer of 2021, TPP concluded a comprehensive assessment of the NHS network in Texas. All findings from the assessment were coordinated with the affected MPOs and FHWA, and recommendations for modifications to the NHS were submitted by TxDOT and approved by FHWA. Approximately 1,050 miles were added to and 660 miles were removed from the NHS. As of September 1, 2021 NHS mileage in Texas breaks down as shown in Table 3-1.
Table 3-1:
NHS Mileage
System
Main NHS (miles)
Intermodal Connectors (miles)
TOTAL (miles)
On-System
16,925
75
17,000
Off-System
1,330
120
1,450
TOTAL
18,255
195
18,450
The NHS can be easily viewed on the Statewide Planning Map by clicking on the “National Highway System” overlay.