Country and Local Roads:
In
the 2800 countries of the United States there are 2.3 million mi of rural
roads, not in the state highway systems. A relatively small portion of this
mileage is in the federal-aid secondary system. These are commonly classified
as local rural roads. Not all of them are administered at the country level,
for there are some 15,000 rural towns, townships, and other jurisdictions that
have distinct and separate road systems.
Although these local rural road
systems constitute 71% of the nation’s road mileage, the vehicle-miles
accumulated on them are less than 20% of the total. Their function is largely
that of land service, and average daily traffic is about 150 vehicles per day. Improvements
are often of a low order; 75% have only soil, gravel, slag, or stone surfacing.
Land-use studies by highway planning surveys have revealed that many countries
have mileage in excess of that needed for proper land service and that money is
wasted in maintaining these roads.
City Streets:
As
noted, some important city streets have been incorporated into the federal-aid
or state highway systems. There remains 490,000 mi of streets and alleys in
16,000 urban communities that are under local control. Some serve primarily as
arteries for local traffic and others mainly provide access to property.
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