Years back, when state bond money was used to purchase the right-of-way (ROW), a letter roughly described the width of the ROW. Keep in mind that 52 feet is all that is needed for three tracks, and 68 feet is all that is needed for FOUR tracks.
"This letter agreement sets forth
the terms and conditions pursuant to which the Peninsula Corridor
Study Joint Powers Board ("JPB") and Southern Pacific
Transportation Company ("SP" or "SPT") will
purchase certain SP properties in San Francisco, San Mateo, Alameda
and Santa Clara Counties for passenger commute operations."
ROW width (ft) Section descriptions
(southern endpoints only)
Bayshore to ...
100 Brisbane M Street
130 just south of US 101 overpass in SSF
100-150 Oyster Point Blvd. / Butler Road
150 US 101 overpass south of SSF station
80-100 Linden Ave grade crossing
100-80 San Bruno Ave
50-130 (generally 130) Santa Cruz Ave (MP 13) in Millbrae
100-130 Lincoln Ave (MP 15) in Burlingame
75-125 Grand Blvd (MP 17) in San Mateo
60-100 Hayward Park (MP 19)
60-80 Laurie Meadows underpass (MP21) in San Mateo
60-75 San Carlos (MP 23)
50-75 Hopkins Ave (MP 25) in Redwood City
40-80 north of Berkshire Ave. in Redwood
City
As an example of how to read the above, if you wanted to check
on the the ROW width through downtown San Mateo, you can see
that it varies between 60 and 100 feet in the 2-mile stretch
between Grand Boulevard (milepost 17) in San Mateo and Hayward
Park (milepost 19).