San Diego and Imperial Valley Railroad

San Diego and Imperial Valley Railroad
	SDIY 702, a locomotive for the San Diego and Imperial Valley Railroad at the railroad's yard in Downtown San Diego.
Overview
Fleet	Two NRE 3GS21B diesel-powered genset locomotives
Parent company	Genesee & Wyoming
Reporting mark	SDIY
Locale	San Diego
Dates of operation	1984–present
Technical
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length	38.8 miles (62.4 km) (7.2 miles (11.6 km) currently unused)
No. of tracks	1–2
Other
Website	San Diego & Imperial Valley Railroad
Route map
Route map
	U.S.
	Mexico

The San Diego and Imperial Valley Railroad (SD&IV) (reporting mark SDIY) is a class III railroad operating freight rail service in the San Diego area, providing service to customers in the region and moving railcars between the end of BNSF Railway in downtown San Diego and the Mexico–United States border in San Ysidro. It was established in October 1984 and is owned and operated by Genesee & Wyoming.

The railroad has exclusive trackage rights to operate over tracks of the San Diego and Arizona Eastern Railway, a subsidiary of the San Diego Metropolitan Transit System, the regional public transit service provider. Tracks are shared with the San Diego Trolley, another subsidiary of the Metropolitan Transit System, and freight trains are only operated at night when passenger service is not in operation.