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Does a speed
limit set at the 85th percentile speed satisfy everyone?
In
few other ways does society ask and expect behavioral consistency
such as it does in driving on our streets and highways. But drivers'
skills, attitudes, and time pressures vary greatly, as does their
perception of an appropriate speed limit. Whatever the speed limit,
some will consider it to be too high; others, too low. What the
public should expect and demand is that, within the latitude provided
in Maryland law, engineers set the most appropriate speed limits
on the basis of thorough engineering study and the application of
sound traffic engineering principles.
If motorists
speed through a residential neighborhood, what should be done?
First,
consider that traffic in most residential neighborhoods is comprised
principally of those who live in those neighborhoods and who are
most familiar with the street, the traffic characteristics and other
conditions that affect the safe speed. Nevertheless, it is human
nature for some to feel that the maximum safe speed for their street
is much lower than for similar streets.
If the speed
limit appears to be appropriate, but speeders are creating a safety
hazard, it likely is an enforcement matter. Contact the law enforcement
agency having jurisdiction over the street and ask that speeds be
checked and appropriate enforcement action taken.
If, in light
of the information provided in this brochure, the speed limit itself
seems to be unrealistically high, contact the traffic engineering
agency having jurisdiction – all of the large political subdivisions
have a traffic engineering office. If there is no such office, contact
the law enforcement agency.
What if those
steps fail to achieve appropriate speeds?
Sometimes
circumstances in certain residential areas require still slower
speeds than can be achieved by posted speed limits, other traffic
signing and/or enforcement. Under those circumstances, tragic engineering
studies might determine that "traffic calming" techniques, such
as roundabouts, chokers, speed humps (not speed bumps), raised crosswalks,
pedestrian refuge areas, or other physical controls, can reduce
speeds and make street-crossing easier and safer.
Is it always
safe to drive at the speed limit?
As
described, speed limits typically are set for ideal conditions.
Therefore, drivers must recognize and appropriately respond to adverse
conditions. Maryland vehicle law requires that motorists drive at
a reasonable and prudent speed and with a regard for existing and
potential dangers. Motorists must adjust their speed according to
the existing vehicle and pedestrian traffic, road surface, lighting,
and weather conditions. Maintaining a safe speed at all times is
a serious responsibility shared by all motorists.
MARYLAND
DEPARTMENT OF TRANSPORTATION
State
Highway Administration
Office
of Traffic and Safety
Traffic
Safety Division
410-787-5822
Jan.1997
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