Texas T

A Texas T, also called a T-ramp, is a T-shaped highway ramp that combines entrance and exit ramps into a single structure that allows entrance and exit to the left (inside) lanes of an expressway.

It is intended to avoid traffic congestion caused by large numbers of high-occupancy vehicles crossing several lanes near exits.

Similarly, when entering the expressway, vehicles can merge directly into the leftmost lane.

The ramp has a T shape because typically the most important destination for traffic is a transit center or business district located to one side of the expressway, and the ramp provides access only to and from this side.

For example, a number of Texas Ts were built over the last few years in the suburbs of Seattle to provide HOV access to transit centers, and more are under construction or planned.