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Performance Monitoring 73
age load per bus and peak and off-peak periods for the transportation link based on the high-
est and lowest ridership periods. The number of instances in which a bus was full and could
not serve all passengers must also be monitored to determine the best corrective measure for
the future.
Air passenger and employee ridership can be compared with the number of passengers in the
market area of the offsite terminal and the number of employees in the market area to determine
the market penetration of the offsite terminal and transportation link. Ridership patterns can be
compared with the airline seat distribution, considering lead times to get to the airport and
through security for the flight, and lag times for leaving the airport with or without checked lug-
gage. Information from various reports can be used to determine whether schedule adjustments
are necessary, particularly if service needs to be added at busy times. If data indicates that some
peak times at the airport are not also peak times on the bus, further analysis can be done to deter-
mine the composition of passengers to determine whether additional marketing may attract
more riders.
Data that will be useful for evaluating parking performance includes number of entrances and
exits by day, the distribution of exits by length of stay, the average length of stay, vehicle occu-
pancy, and average ticket price. This data can be compared with on-airport parking statistics to
determine whether parking patterns are similar. It should also be compared with ridership on
the transportation link. The project sponsor should try to segregate employee and passenger
parking data. Parking statistics will assist the project sponsor in determining how capacity is
meeting demand, when to plan for additional capacity, and how to prepare for peak periods. If
there is a short-term parking area, occupancy should be monitored to determine whether the
supply is sufficient.
Operational Performance Measures
Operational performance measures report on service efficiency and quality of service. Reports
in this category include trip times and average trip times; on-time performance statistics; main-
tenance statistics for vehicles; and employee performance, retention, and absences. Transaction
time per ticket sales may also be important if it affects on-time performance of the bus or the
passenger's ability to board the next bus.
Mitigation
The offsite terminal and transportation link reduces the impacts of low-occupancy trips that
otherwise would have been made to the airport. Information on reduced vehicle trips, emissions
savings, and savings in VMT are useful for reporting progress and promoting the benefits of the
offsite terminal and transportation link within the sponsoring organization, to community groups,
to environmental groups, and to elected officials.
Surveys
Survey data can provide information on ridership demographics, passenger receptiveness to
changes in service, fares and amenities, passenger satisfaction, and effectiveness of advertising.
Surveys conducted while the service is new and growing are important to understand how the
service is developing and to determine ways to boost ridership. Surveys are also important once
ridership has reached maturity to track trends, to monitor changes, to determine how to retain
