rail system is the busiest in the United States with average weekday boardings as of . In terms of route length, Metro's light rail system is the second largest in the United States. Security and safety Half of the Metro Rail's trains and stations are patrolled by the Los Angeles County Sheriff's Department under a law enforcement contract. The Los Angeles Police Department, and Long Beach Police Department also patrol stations within their respective cities, also under contract. The system is also monitored by security personnel through closed-circuit television cameras in Metro Rail stations and subway cars. History In the early 20th century, Southern California had an extensive privately owned rail transit network with over of track, operated by Pacific Electric (Red Cars) and Los Angeles Railway (Yellow Cars). However, from 1927 revenue shortfall caused Pacific Electric to begin replacing lightly used rail lines with buses. In 1958 the remnants of the privately owned rail and bus systems were consolidated into a government agency known as the Los Angeles Metropolitan Transit Authority or MTA. By 1963 the remaining rail lines were completely removed and replaced with bus service. In the following decades, growing traffic congestion led to increased public support for rail transit's return. Beginning in the 1970s, a variety of factors, including environmental concerns, an increasing population and the price of gasoline led to calls for mass transit other than buses. The Los Angeles County Metropolitan Transportation Authority (LACMTA, now branded as Metro) began construction of the initial lines throughout the 1980s using revenues from a voter-approved increase in sales tax. The Blue (A) Line finally opened on July 14, 1990, some 27 years after the final streetcar line closed. Since that date, the system has been developed to its current size. The following table shows this expansion's timeline: Planned expansion Metro has worked to plan and prioritize project funding and implementation. Metro's 2009 Long Range Transportation Plan (LRTP) was developed to provide a long-term vision of transportation system development for the next 30 years. Metro worked to update the 2009 LRTP plan citing new housing trends and fiscal changes. Metro released the updated LRTP in 2020. Beginning in 2014, Metro saw its ridership numbers begin to decline. Many explanations exist for the decline, including safety concerns, an increase in ride-hailing service usage, low-income housing opportunities drying up in L.A. because of the increase in rents, and a shortage