49 CFR Parts 37 & 38 - Department of Transportation (DOT) ADA Regulations

The definitions of "fixed route system'' and "demand responsive system'' derive directly from the ADA's definitions of these terms. Some systems, like a typical city bus system or a dial-a-ride van system, fit clearly into one category or the other. Other systems may not so clearly fall into one of the categories. Nevertheless, because how a system is categorized has consequences for the requirements it must meet, entities must determine, on a case-by-case basis, into which category their systems fall.

In making this determination, one of the key factors to be considered is whether the individual, in order to use the service, must request the service, typically by making a call.

With fixed route service, no action by the individual is needed to initiate public transportation. If an individual is at a bus stop at the time the bus is scheduled to appear, then that individual will be able to access the transportation system. With demand-reponsive service, an additional step must be taken by the individual before he or she can ride the bus, i.e., the individual must make a telephone call.

(S. Rept. 101-116 at 54).

Other factors, such as the presence or absence of published schedules, or the variation of vehicle intervals in anticipation of differences in usage, are less important in making the distinction between the two types of service. If a service is provided along a given route, and a vehicle will arrive at certain times regardless of whether a passenger actively requests the vehicle, the service in most cases should be regarded as fixed route rather than demand responsive.

At the same time, the fact that there is an interaction between a passenger and transportation service does not necessarily make the service demand responsive. For many types of service (e.g., intercity bus, intercity rail) which are clearly fixed route, a passenger has to interact with an agent to buy a ticket. Some services (e.g., certain commuter bus or commuter rail operations) may use flag stops, in which a vehicle along the route does not stop unless a passenger flags the vehicle down. A traveler staying at a hotel usually makes a room reservation before hopping on the hotel shuttle. This kind of interaction does not make an otherwise fixed route service demand responsive.

On the other hand, we would regard a system that permits user-initiated deviations from routes or schedules as demand-responsive. For example, if a rural public transit system (e.g., a section 18 recipient) has a few fixed routes, the fixed route portion of its system would be subject to the requirements of subpart F for complementary paratransit service. If the entity changed its system so that it operated as a route-deviation system, we would regard it as a demand responsive system. Such a system would not be subject to complementary paratransit requirements.