37. Full Street Closure
A full street closure is accomplished by installing a physical barrier that blocks a street to motor vehicle traffic either in initial design (e.g., new cul-de-sac) or by closure of an existing street. Full street closures should be used only in the rarest of circumstances. Neighborhoods with cul-de-sac streets require extensive out-of-the-way travel, which is not a mere convenience issue, but has serious implications for impacts to other streets. All traffic is forced to travel on feeder streets, which has negative consequences for the people who live on those streets and forces higher levels of controls at critical intersections.
If a street closure is done, it should always
allow for the free through movement of pedestrians (including wheelchair
users) and bicyclists. Emergency vehicles should also be able to access
the street; this can be done with a type of barrier or gate that permits
large vehicles to traverse it but not automobiles. Examples are mountable
curbs or an access way with a raised element in the center that a low
vehicle would hit. This second is usually only appropriate for places
with no snow (otherwise the device would be covered with snow and the
access way could not be cleared).
The cost for a full, landscaped street closure varies from approximately $30,000 to $100,000, depending on conditions.