The Montalvo Cutoff, a railroad line opened by the Southern Pacific Railroad on March 20, 1904, to improve the alignment of its Coast Line, runs east–west through the valley.
In 1905, the longest train tunnel in the United States at that time was completed at the east end of Simi Valley.
Tunnel #26 still stands today linking Simi Valley and the San Fernando Valley.
The area was originally served by the Santa Susana Depot which was also opened in 1904 as a combination passenger and freight depot built by the Southern Pacific and located on Los Angeles Avenue near Tapo Street.
 The station remained in use for the following 60 years until changes in the business model for railroads evolved that rendered the depot useless to the railroad.

Simi Valley Station is used by Amtrak and Metrolink on the railroad's Ventura County Line, after the line was purchased from Southern Pacific.
The station is located at 5050 Los Angeles Avenue, west of Stearns Street.
Simi Valley Transit buses stop on Los Angeles Avenue in front of the station.
There are connections from Simi Valley north to Santa Barbara and San Luis Obispo, and south to Los Angeles, Orange, and San Diego Counties.

These trains, as well as the buses, run 7 days a week and stop in Simi Valley several times each day.
The Simi Valley station is unstaffed; however, tickets are available from automated ticket dispensers, conductors on board the trains, travel agents, by telephone, or from the Amtrak and Metrolink websites.

The United States Postal Service operates the Simi Valley Post Office at 2511 Galena Avenue, the Kopy King Post Office at 2157 Tapo Street, and the Mount McCoy Post Office at 225 Simi Village Drive.

The city operates its own police department, and contracts with the Ventura County Fire Department to provide fire protection services.
 There are six fire stations within Simi Valley, and the city recently built a state-of-the-art police station.
American Medical Response, in conjunction with Ventura County Fire Department, provide Emergency Medical Services at the Advanced Life Support (ALS) level.

The city provides sanitation service to residences, businesses and other users.
Underground sewer lines collect sewage and wastewater which is treated at the city's sewage plant.
The Montalvo Cutoff, a railroad line opened by the Southern Pacific Railroad on March 20, 1904, to improve the alignment of its Coast Line, runs east–west through the valley. In 1905, the longest train tunnel in the United States at that time was completed at the east end of Simi Valley. Tunnel #26 still stands today linking Simi Valley and the San Fernando Valley. The area was originally served by the Santa Susana Depot which was also opened in 1904 as a combination passenger and freight depot built by the Southern Pacific and located on Los Angeles Avenue near Tapo Street.  The station remained in use for the following 60 years until changes in the business model for railroads evolved that rendered the depot useless to the railroad.
Simi Valley Station is used by Amtrak and Metrolink on the railroad's Ventura County Line, after the line was purchased from Southern Pacific. The station is located at 5050 Los Angeles Avenue, west of Stearns Street. Simi Valley Transit buses stop on Los Angeles Avenue in front of the station. There are connections from Simi Valley north to Santa Barbara and San Luis Obispo, and south to Los Angeles, Orange, and San Diego Counties.
These trains, as well as the buses, run 7 days a week and stop in Simi Valley several times each day. The Simi Valley station is unstaffed; however, tickets are available from automated ticket dispensers, conductors on board the trains, travel agents, by telephone, or from the Amtrak and Metrolink websites.
The United States Postal Service operates the Simi Valley Post Office at 2511 Galena Avenue, the Kopy King Post Office at 2157 Tapo Street, and the Mount McCoy Post Office at 225 Simi Village Drive.
The city operates its own police department, and contracts with the Ventura County Fire Department to provide fire protection services.  There are six fire stations within Simi Valley, and the city recently built a state-of-the-art police station. American Medical Response, in conjunction with Ventura County Fire Department, provide Emergency Medical Services at the Advanced Life Support (ALS) level.
The city provides sanitation service to residences, businesses and other users. Underground sewer lines collect sewage and wastewater which is treated at the city's sewage plant.
Simi Valley, California