According to Transformative Urban Mobility Initiative, transit line/lane capacity (measured in passengers per hour per direction (pphpd)) varies as follows:

·      Bus                             5,000

·      Bus Rapid Transit       9,000

·      Light Rail                   20,000

·      Heavy Rail                60,000

By contrast, cars are 2,000 pphpd.

ATN systems in public service have the following in-service dates, minimum headways (sec), vehicle capacities (passengers), and line capacities (pphpd):

Note that the line capacities shown are the maximum theoretical capacities based on the minimum headways and number of passengers. Actual demonstrated capacities are typically lower for the primary reason that the maximum number of vehicles have not been provided because demand is less than capacity.

Next month we will address ways ATN capacity is being increased by various suppliers.