The line included five tunnels, numbered north to south, and a former railyard near Brisbane, the Visitacion or Bayshore Yard.
The historic Bayshore Roundhouse, previously used to service SP's steam locomotives, still exists at the yard.
The first four tunnels are within the city limits of San Francisco.

The maximum grade of the completed Bayshore Cutoff is 15.8 feet per mile (2.99 m/km) (0.3% grade) compared to the 3% maximum grade of the older route.
The maximum elevation of the Bayshore Cutoff is 20.3 feet (6.2 m), while the prior route rose to 292 feet (89 m) above sea level.
The total distance between San Francisco and San Bruno along the Cutoff is 11.04 miles (17.77 km), saving 2.65 miles (4.26 km) over the original route west of San Bruno Mountain.
The original 1900 design called for an aggregate length of the two tunnels under Potrero Hill and Sierra Point of 1,800 feet (550 m).

After completion, travel time from San Jose to San Francisco was cut from two hours to ninety minutes (for local trains) and seventy minutes (for limited-stop trains).
The Evening News breathlessly advertised "the annihilation of seventeen minutes in a schedule" in an article covering the opening of the Cutoff.

Although the Bayshore Cutoff is double-tracked, the right-of-way outside the tunnels is sized to accommodate quad tracks.
Quad tracks were added in Brisbane as part of the Caltrain Express project from 2004 to 2006.
The line included five tunnels, numbered north to south, and a former railyard near Brisbane, the Visitacion or Bayshore Yard. The historic Bayshore Roundhouse, previously used to service SP's steam locomotives, still exists at the yard. The first four tunnels are within the city limits of San Francisco.
The maximum grade of the completed Bayshore Cutoff is 15.8 feet per mile (2.99 m/km) (0.3% grade) compared to the 3% maximum grade of the older route. The maximum elevation of the Bayshore Cutoff is 20.3 feet (6.2 m), while the prior route rose to 292 feet (89 m) above sea level. The total distance between San Francisco and San Bruno along the Cutoff is 11.04 miles (17.77 km), saving 2.65 miles (4.26 km) over the original route west of San Bruno Mountain. The original 1900 design called for an aggregate length of the two tunnels under Potrero Hill and Sierra Point of 1,800 feet (550 m).
After completion, travel time from San Jose to San Francisco was cut from two hours to ninety minutes (for local trains) and seventy minutes (for limited-stop trains). The Evening News breathlessly advertised "the annihilation of seventeen minutes in a schedule" in an article covering the opening of the Cutoff.
Although the Bayshore Cutoff is double-tracked, the right-of-way outside the tunnels is sized to accommodate quad tracks. Quad tracks were added in Brisbane as part of the Caltrain Express project from 2004 to 2006.
Bayshore Cutoff