Editing Loading gauge (section)

====Los Angeles (LACMTA)====
The [[Los Angeles Metro Rail]] system is an amalgamation of two former constituent companies, the [[Los Angeles County Transportation Commission]] and the Southern California Rapid Transit District; both of those companies were responsible for planning the initial system. It is composed of two heavy rail subway lines and several light rail lines with subway sections; while all lines are standard gauge, inconsistencies in electrification and loading gauge prohibit the light rail trains from operating on the heavy rail lines, and vice versa. The LACTC-planned [[A Line (Los Angeles Metro)|Blue Line]] was opened in 1990 and partially operates on the route of the [[Pacific Electric]] interurban railroad line between downtown Los Angeles and Long Beach, which used overhead electrification and street-running streetcar vehicles. The SCRTD-planned [[B Line (Los Angeles Metro)|Red Line]] (later split into the Red and [[D Line (Los Angeles Metro)|Purple]] lines) was opened in 1993 and was designed to handle high-capacity heavy rail transit cars that would operate underground. Shortly after the Red Line began operations, the LACTC and the SCRTD merged to form the [[Los Angeles County Metropolitan Transportation Authority|LACMTA]], which became responsible for planning and construction of the [[C Line (Los Angeles Metro)|Green]], [[L Line (Los Angeles Metro)|Gold]], [[E Line (Los Angeles Metro)|Expo]], and [[K Line (Los Angeles Metro)|K]] lines, as well as the [[D Line Extension]] and the [[Regional Connector]].