This paper discusses some traffic engineering issues and needs, which have arisen during the development of new light rail transit (LRT) systems in the US cities of San Jose, Dallas, Chicago, Portland, and San Diego. Access issues are different for each of the main types of LRT stations: (1) termini; (2) stations at major mode interfaces; and (3) intermediate stations. LRT platform locations can affect central area streets by reducing road lane widths and conflicting with property access. LRT lines can be located in: (1) roadway medians; (2) interior lanes, mixed with street traffic; (3) on the sides of the street; or (4) within separate rights of way. Turnings of LRT lines across traffic lanes, at intersections or elsewhere, at intersections or elsewhere, cause special problems and should be minimised. Other important LRT issues include level crossings and the need to leave room for parking and delivery facilities for road vehicles. General guidelines are suggested for: (1) station access and parking at central and non-central areas; (2) street traffic operations and LRT signal coordination and progression; (3) protection measures at level crossings; and (4) driveways, on-street parking and delivery facilities in central areas.
Abstract