Civil Engineering Reference
In-Depth Information
The rapid transit service to the city center should be fast, frequent and reliable;
headways should be 10
12 min or less during peak periods, and not more than
15 min midday. Headways of 20
-
30 min or less are desirable for commuter rail
-
lines during rush hours.
22.3.2.2 Site Considerations
New facilities should be placed where they will not adversely affect the use of
existing sites. Sites should be compatible with adjacent land uses. Site selection
should give (in order of importance) priority to (1) land currently used for parking;
(2) underdeveloped or unused land in public ownership; (3) undeveloped public
land; and (4) developed private land.
Large park-and-ride facilities generally should not be located near town centers,
or in densely developed areas.
Sites should be of suitable size and shape to serve anticipated demand, to permit
ef
cient design of access, and of convenient passenger transfer facilities; and should
allow easy parking maneuvers.
22.3.2.3 Facility Size
Very large or very small facilities should generally be avoided. Small lots do not
have enough space to justify frequent transit service, and parkers would spill over to
nearby areas. Very large facilities can result in long walking distances or possible
under-utilization.
Bus Rapid Transit (BRT) lots should contain at least 250 spaces. An optimum
size range is 400
700 spaces
—
depending on demand
-
Commuter rail and rail transit facilities usually range from 500 to more than
2,500 spaces. These facilities support frequent transit service and draw riders
from a large catchment area. Larger garages and lots may create congestion on
approach roads and require a grade-separated access road system.
To accommodate daily
fluctuations in park-and-ride demand, site occupancy
should not exceed 95 % occupancy over a typical day. A design factor of 80 %
occupancy is desirable to allow for ridership growth at the station
fl
22.3.3 Travel Characteristics of Park-and-Ride Users
Examples of the types of transport used by park-and-ride patrons in their trips to
their center city destinations are summarized below.
