TM5-803-14
CHAPTER 6
DESIGN FOR ON-SITE VEHICULAR CIRCULATION AND PARKING
6-1. General.
Table 6-1. Dimensions (in Feet) for Design Vehicles
(for Non-organizational Vehicle Parking).
This chapter provides general guidelines and crite-
ria, or standards, for determining the size, layout,
Overhang
and design of on-site vehicular circulation and
Rear
Front
Design Vehicle (Symbol)
Width Length
parking. The chapter covers access and service
5
Passenger Car (P)
7
19
3
drives; parking areas; and special vehicle-use ar-
eas including gateways, drop-offs, dumpsters, de-
6
Single Unit Truck (SU)
8.5
30
4
liveries, and drive-in facilities. This chapter also
Intermediate
addresses methods for mitigating the visual im-
4
6
Semitrailer WV-40)
8.5
50
pact of parking and other vehicle use areas.
Large Semitrailer
MTMC provides detailed information on all as-
2
55
3
8.5
(WB-50)
pects of circulation design.
8.5
40
7
8
Single Unit Bus (BUS)
6-2. Design Vehicles.
4
6
Motor Home (MH)
9
30
A variety of vehicles can be expected on any site.
Motor Home & Boat
These include cars, pick-up trucks, garbage trucks,
53
4
8
Trailer (MH/B)
8
delivery vans and trucks, buses, recreation vehi-
cles, fire trucks, oversized or tracked organiza-
Table 6-2. Minimum Turning Radii (in Feet)
tional vehicles, and motorcycles. Site entrances
for Design Vehicles.
and exits should be designed to accommodate the
Minimum
largest vehicle using the site. Other areas (e.g,
Design
Minimum
parking lots or loading docks which have special
Turning
Inside
requirements) should be designed for the largest
Radius
Radius
Design Vehicle
vehicle using the area.
24
13.8
Passenger Car
Single Unit Truck
42
27.8
Policy on Geometric Design of Highways and
Streets, the American Association of State High-
Intermediate Semitrailer
40
18.9
way and Transportation Officials (AASHTO) places
Large Semitrailer
45
19.2
vehicles into three general classes: passenger cars,
42
24.4
Single Unit Bus
trucks, and buses/recreation vehicles. The passen-
ger car class includes light delivery trucks such as
40
26.0
Motor Home
vans and pick-ups. Table 6-1 lists dimensions for
50
35.0
Motor Home & Boat Trailer
some of the more commonly found vehicles. Table
6-2 lists minimum turning radii for the same
6-3. Access and Service Drives.
vehicles. AASHTO provides an expanded list with
Access drives carry all vehicular traffic on site.
additional dimensions and information. For the
They should be designed to accommodate the full
purposes of design, the design vehicles have larger
range of vehicles. Service drives are limited to
physical dimensions and larger minimum turning
radii than almost all vehicles in their classes.
special vehicle traffic. They should be designed to
b. POV Vehicles. The AASHTO passenger car is
accommodate the particular vehicle.
a. Spacing. Location of access drives should
equivalent to a non-organizational or POV vehicle.
follow these spacing guidelines:
Figure 6-1 illustrates a turning template showing
(1) Maintain 200' or more between access
the turning paths and radii of a POV vehicle.
drives on arterial roads. Table 6-3 provides accept-
AASHTO provides turning templates for the other
able minimum spacing if this is not possible.
design vehicles.
6-1
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