General Description
In parts of the MAX system, particularly in central Portland and Hillsboro, MAX trains run on surface streets. Except for on the Portland Transit Mall, trains run in reserved lanes closed to other motorized vehicles. On the Transit Mall, trains operate on the same lanes as TriMet buses (although MAX trains have traffic priority). Elsewhere, MAX runs within its own exclusive right-of-way, in street medians, alongside freeways, and on former freight railroad lines.
Where the tracks run along a street, intersections are generally controlled by traffic signals which give trains preemption. Where the tracks occupy a completely separate right-of-way, level crossings are protected by automatic crossing gates giving trains the right-of-way. A three-mile (4.8 km) section consists of two tunnels below Washington Park. While this section has only one station, it is 260 feet (79 m) below ground level, making it the deepest transit station in North America and one of the deepest in the world.
Because of Portland's relatively small 200-foot (61 m) downtown blocks, trains operate with only one or two cars. The MAX cars are about 90 feet (27.4 m) long, so a stopped train consisting of more than two cars would block intersections. All service is typically operated with two-car trains, except for certain trips during late-night hours. During the first few years of Red Line and Yellow Line service, those lines normally used single cars on a portion of their service, but as ridership has grown and additional light rail cars have been acquired, those lines now normally use all two-car trains. The 2009-introduced MAX Mall Shuttle, which provided supplementary service along the Portland Transit Mall on weekday afternoons only, normally always used a single car; it was discontinued in June 2011.
Read more about this topic: MAX Light Rail
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