DETERMINING SIZE:
The number of parking spaces to be provided is a function of
carrying capacity...that appropriate number of visitors which can
be accommodated within the inherent capability of a land area to
regenerate itself. The carrying capacity divided by 3.5 visitors
per car will give you a reasonable estimate of the total number of
parking spaces to be provided.
Let's look at a trail within a forested area. Say: the density
of vegetation and the alignment will carry groups of five persons
separated at intervals of not less than 500 feet, and that a closer
interval would detract from the quality of enjoyment of an adjacent
group. The carrying capacity would be the resultant of the
length of the trail (5,000 feet) divided by the interval (500 feet)
multiplied by the number of visitors per group (5 persons) for a
total of 50 persons. Observations show that an additional 25% of
that number will be in the parking area at the same time either
starting to hike or returning from the trail. Parking spaces are
needed for 50 plus 25% (say 12) or 62 persons, divided by 3.5
persons per car for a total of 18 spaces. At 300 SF per car, the
parking area would require 5400 sq. ft. of surface and 180 feet of
curb.
Other standards:
-Offices for 80 employees and 20 visitors at 1.5 persons/car
require 67 spaces.
-Visitor centers for 200 visitors at 3.5 persons/car require
57 spaces plus staff parking.
-Swimming beaches at 165 SF/person may require 500 spaces
located 1,000 feet apart (standard from Griner and
Associates, used at Assateague Island)
-Marinas are based on 1¼ acres of water per boat; allow parking
spaces for one-third the number of rental boat slips
-Amphitheaters are based on 10 SF/person or 3 LF of seating
per person
(See the BOR publication on space standards for such things as acres
of open space and recreational facilities for various population
centers.)
