Question: How many passenger stations are served by Los Angeles County , California 's light rail system ?

text: Transportation in California
Rail travel
See also : History of rail transportation in California and List of California railroads Although known for its car culture , California also has a number of local and regional passenger rail systems , including the following :
California's transportation system is complex and dynamic. Although known for its car culture and extensive network of freeways and roads, the state also has a vast array of rail, sea, and air transport. Several subway, light rail, and commuter rail networks are found in many of the state's largest population centers. In addition, with the state's location on the West Coast of the United States, several important ports in California handle freight shipments from the Pacific Rim and beyond. A number of airports are also spread out across the state, ranging from small general aviation airports to large international hubs like Los Angeles International Airport and San Francisco International Airport. However, in a state with over 39 million people, rapid population expansion, and diverse terrain and weather, that system is under pressure to stay ahead of population growth and transportation needs.
System Type No . of lines Description
Altamont Corridor Express Commuter rail 1 The Altamont Commuter Express , also known as ACE , runs from San Jose northeast to Stockton , providing service from the Silicon Valley to Eastern Alameda County and San Joaquin County
Bay Area Rapid Transit Heavy rail , light rail , automated guideway transit 6 Bay Area Rapid Transit ( BART ) operates in the San Francisco Bay Area , connecting San Francisco with cities in the East Bay and suburbs in northern San Mateo County
Caltrain Commuter rail 1 Caltrain runs from San Francisco south down the San Francisco Peninsula to the Silicon Valley
COASTER Commuter rail 1 The San Diego Coast Express Rail ( COASTER ) operates in the central and northern coastal regions of San Diego County , running from San Diego north to Oceanside
Metro Rail Heavy and light rail 6 Metro Rail is an integrated subway and light rail system serving Los Angeles County
Metrolink Commuter rail 7 Metrolink serves Los Angeles and the surrounding area of Southern California , connecting Los Angeles , San Diego , Orange , Riverside , San Bernardino and Ventura Counties
Muni Metro Light rail 6 Muni Metro is a premetro/light rail system connecting various neighborhoods and districts of San Francisco
Sacramento RT Light Rail Light rail 3 The Sacramento Regional Transit District ( RT ) light rail system serves Sacramento and vicinity
San Diego Trolley Light rail 4 The San Diego Trolley serves the metropolitan area of San Diego
San Francisco cable car system Streetcar 3 The world 's last manually operated cable car system continues to operate in northeast San Francisco , but the system 's small service area and premium fares for single rides currently make the cable cars used more as a tourist attraction
Sonoma-Marin Area Rail Transit Commuter rail 1 Sonoma-Marin Area Rail Transit ( SMART ) runs through Sonoma and Marin counties
SPRINTER Diesel light rail 1 The SPRINTER operates in north region of San Diego County , running from Oceanside east to Escondido
VTA Light Rail Light Rail 3 The Santa Clara Valley Transportation Authority ( VTA ) Light Rail system serves San Jose and its suburbs in the Silicon Valley