San Bruno is a city located in San Mateo County, California. It is situated on the San Francisco Peninsula, just south of San Francisco. The city is known for its close proximity to San Francisco International Airport (SFO), which is one of the busiest airports in the United States. This makes San Bruno an important transportation hub for both passengers and freight.

In addition to its connection to SFO, San Bruno is also home to a major freight rail yard operated by Union Pacific Railroad. The San Bruno Yard, as it is known, serves as a crucial hub for the transportation of goods throughout the region. It handles a wide range of freight, including containers, automobiles, and bulk commodities.

The history of freight transportation in San Bruno dates back to the late 19th century when the Southern Pacific Railroad built a line through the area. This opened up opportunities for commerce and trade, and the city quickly grew as a result. Today, San Bruno continues to play a vital role in the movement of goods, with its strategic location and excellent transportation infrastructure.