Why is there such a wide shoulder on I-10 eastbound between Wurzbach and Callaghan and Loop 410 between Blanco and I-10?
Those stretches of freeway, which currently have four marked lanes, will eventually have five or six lanes. However, until the I-10/Loop 410 interchange is complete, having five or six lanes on the approach to the interchange would create a significant bottleneck due to reduced capacity through the interchange area. Therefore, instead of opening all of the lanes on those routes, they just marked the four lanes and left the remainder of roadway as a “shoulder”. When the interchange is done, it will be a simple matter of marking the additional lanes.
