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Table 2. Airport APM performance measures. and dwell to carry out the passenger exchange, with a station
being the general locale at which passengers can board and
AIRPORT APM PERFORMANCE MEASURES
alight APM trains, regardless of the configuration or number
Service Availability (one of three approaches to be selected)
Safety Incidents per 1,000 Vehicle Service Miles of platforms at the station. For example, a station with two
O&M Expense per Vehicle Service Mile side platforms separated by a dual-lane guideway is counted
Actual and Scheduled Capacity (Peak Versus All Other) as one station.
Passenger Satisfaction
Missed Stations per 1,000 Station Stops
Unintended Stops per 1,000 Interstations
5.1.6 Vehicles in Total Fleet
Vehicles in Total Fleet is defined as the number of vehicles
period of the day that maximum service is provided during the
in the system that are either currently operable or capable of
reporting period, with a route being the unique path a train
being operable once the appropriate maintenance, cleaning,
follows and station stops a train makes from its terminal of
or other action has been undertaken. For the purpose of this
departure to its terminal of arrival before changing directions
system characteristic, "vehicle" is defined and distinguished
(or in the case of single- or dual-lane loop systems, before
as follows:
beginning the same route again). For example, the Routes
Operated in Maximum Service for a dual-lane pinched-loop
Car. An individual passenger-carrying unit that cannot
system would typically be two; for a dual-lane shuttle system,
operate individually but must be connected and share
four; for a dual-lane loop system, two; and so on.
equipment with other cars to form a vehicle. A car is not
Routes Operated in Maximum Service excludes routes
a vehicle.
implemented to address atypical, failure, or special-event
Vehicle. The smallest passenger carrying unit that can operate
service during the reporting period.
individually. This may be a single unit or a permanently
coupled set of dependent cars. A vehicle can also be coupled
5.1.4 Trip Time in Maximum Service with one or more other vehicles to form a train.
Train. A set of one or more system vehicles coupled together
Trip Time in Maximum Service is defined as the trip time
and operated as a single unit.
in the system, by route, during the peak period of the day that
maximum service is provided during the reporting period,
Vehicles in Total Fleet does not include heavily damaged
beginning upon the start of the door closing sequence at the
vehicles in need of extensive repair, decommissioned vehicles
originating terminal and ending once all doors are open at
awaiting disposal, and other similar permanently blocked-up
the destination terminal (or in the case of single- or dual-lane
vehicles that would require major repair or refurbishment
loop systems, ending once all doors are open at the originat-
efforts.
ing terminal).
This system characteristic includes interstation travel times
and dwell times at intermediate stations and excludes dwell 5.2Service Descriptive Characteristics
times at the origin and destination terminals as well as atypi-
cal and failure-related events and operations, such as wayside Service descriptive characteristics of airport APM systems
speed restrictions and onboard vehicle speed limitations. are descriptors that provide a general understanding of the
service and operational aspects of airport APM systems and
help put into perspective the performance measures of such
5.1.5Stations
systems when they are used to compare performance among
The Stations system characteristic is defined as the num- other airport APM systems. Service descriptive character-
ber of stations in the APM system at which APM trains stop istics are likely to change from one reporting period to the
Table 3. Airport APM system and service descriptive characteristics.
SYSTEM DESCRIPTIVE SERVICE DESCRIPTIVE
CHARACTERISTICS CHARACTERISTICS
Single Lane Feet of Guideway, Mainline
Passenger Trips
Single Lane Feet of Guideway, Other
Vehicle Service Miles
Routes Operated in Maximum Service
Vehicles Operated in Maximum Service
Trip Time in Maximum Service
Vehicles Available for Maximum Service
Stations
Headway in Maximum Service
Vehicles in Total Fleet
