§ 91.03 What do the data-collection terms mean?

Arriving load.  The number of passengers onboard a transit vehicle as it arrives at a stop.

Automatic passenger counter.  An automated means of counting passengers as they board or alight transit vehicles with treadle mats, infrared beams, or other devices placed by the doors of a transit vehicle.

Calculated load.  The number of passengers onboard a transit vehicle as it arrives at or leaves a stop that you calculate from data on boardings and alightings at individual stops.  It should equal the observed load.

Commuter vanpool.  A common form of vanpool service (VP) that comprises vans, small buses and other vehicles operating as a ridesharing arrangement, providing transportation to a group of workers commuting directly between their homes and their regular work sites within the same geographical area.  The vehicles would not be in revenue service during the working hours of the participating workers.

Distance-based approach.  A method to obtain PMT that keeps track of the distance traveled by every passenger.    

Leaving load.  The number of passengers onboard a transit vehicle as it leaves a stop.

Load-based approach.  A method to obtain PMT that is based on the boardings and alightings at individual stops and on the distance between consecutive stops.

NTD sample.  The sample of service units you select at random according to your sampling plan that meets FTA’s 95% confidence and 10% precision levels for reporting to the NTD.

Observed load.  The number of passengers onboard a transit vehicle as observed directly by a ride-checker while onboard that transit vehicle.

Ride check.  A method of collecting sample data with one or more persons observing and recording passenger boarding and alighting activities while riding in a transit vehicle. 

Stop.  Any spatial location at which a transit vehicle allows passengers to board or alight from the vehicle. 

Vehicle trip length.  The total distance traveled by a transit vehicle during a one-way trip for scheduled services.  For example, the cumulative distance traveled from the beginning point to the end point of a particular alignment of a route is the vehicle trip length for this trip.  The vehicle trip length may vary by direction and alignment for a given route.