Interstate 10 (878.7 mi), being the longest highway in Texas extends over the entire state form El Paso to Orange. The interstate connects major cities like El Paso, San Antonio, Houston and all. Some of the other interstates in Texas are Interstate 20, Interstate 35, Interstate 40, Interstate 110, Interstate 610, Interstate 820 and many more. The State Highway system of Texas is classified as SH (State Highways), SP (Spurs) and LP (Loops).
Located in south-western part of Houston near Loop 610, the US 59 is considered as the busiest highway in Texas.
The road network of the state involves more than 79, 535 miles of public highway. These highways are provided with specialized features to reduce rush hour congestion. The HOV (high-occupancy-vehicle) lanes are the special roads where only pooled vehicles are allowed for smoother flow of traffic. Texas T is a unique feature of Texas free-ways, which is basically a specialized ramp design to facilitate smoother regulation of traffic in HOV lanes. Another integral feature of Texas free-ways are frontage roads or feeder roads, which allow easier access to individual city streets from the free-ways.