Due to a City of San Antonio project, route 520 Zarzamora Frequent will be on the following detours through May 2018.

From Fredericksburg Road at Louis Pasteur Drive, continue on Fredericksburg
Left on Medical Drive
Left on Ewing Halsell Drive
Continue onto Louis Pasteur
Continue regular route

From Louis Pasteur at Floyd Curl Drive, left on Floyd Curl
Right on Medical
Right on Fredericksburg
Continue regular route