Why not build over Highways U.S. 101 or I-280?
The option of having HSR run along the I-280 or U.S.101 corridor was considered, but not selected by the CHSRA. The CHSRA thinks the Caltrain corridor alignment would increase intercity connectivity and accessibility to San Francisco and the Peninsula, minimize environmental impacts, and require less acquisition of land and property since this alignment utilizes the existing Caltrain right-of-way. The Caltrain corridor alignment could also provide safety and traffic benefits by grade-separating existing at-grade roadway crossings. For these reasons, the CHSRA identified the Caltrain corridor as the preferred alignment for HSR services between San Francisco and San Jose and at this time is the only option being considered.
