layout, design and construction handbook - California Department of ...

402. Restrooms
3. Minimum driveway widths between rows of car/trailer parking spaces:
a. 20’ for one-way traffic for both 45 o and 60 o parking
b. 24’ for two-way traffic for both 45 o and 60 o parking
c. 30’ for both one and two-way traffic for 90 o parking
4. Unless unusual soil conditions are encountered at a site, 2” AC (asphaltic
concrete) laid over 6” AB (aggregate base rock) will usually be
satisfactory.
5. Special specifications may be necessary for
paving parking areas in unusually hot or
cold climates in desert and mountain
regions. Specific information can be
obtained from district offices of the
California Department of Transportation.
6. It is not recommended that a fog seal be
applied to the paving until it is
approximately one year old. New paving is
still somewhat pliable and will continue to
compress under traffic loads the first few months following construction.
A fog seal applied too soon will quickly break down, will be ineffective
and waste construction dollars.
7. Asphalt curbing is economical and serves well for drainage control.
However, it is to be avoided where vehicle wheels will impact and/or
come to rest against the curb. Wheels will impact and break the curb,
particularly during warm summer months when prolonged heat softens
the asphalt. Where wheel loads occur, concrete curbs are to be
constructed.
A. General Requirements
1. Restrooms are to be located as convenient to the launching ramp as
possible.
2. The restroom architectural design should be compatible with the
surrounding area and existing structures.
3. Restrooms must meet all local, state and federal public health
requirements.
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Figure 50. Paving/Concrete Curb Detail.