Civil Engineering Reference
In-Depth Information
Along pairs of parallel arterial streets, such as: Chestnut Street and Walnut
Street, Philadelphia; Broadway and Lincoln Ave., Denver; Washington and
Warren Boulevards, Chicago; and most cross town streets and north-south
avenues in Manhattan.
16.7.6 Installation Guidelines
The following guidelines underlie the installation of one-way streets:
One-way pairs should be comparable in width, capacity, continuity and land use
One-way pairs should be within 600 feet of each other wherever possible
Provide adequate transition to two-way traf
c at the beginning and end of the
one-way system
Provide con
fl
ict-free circulation around city blocks
Avoid interposing a two-way street between a one-way pair
c signals along each street (or within a network) to provide
progressive movements on common cycle lengths. Avoid long cycle lengths
wherever possible
Manage conflicts between pedestrians and turning vehicles
Coordinate traf
Avoid street widths that exceed four moving lanes
Accommodate public transit service wherever possible
16.7.7 One-Way Toll Collection
One-way toll collection on approaches to bridges and tunnels and along toll roads
with barrier tolls is a cost-effective way to reduce traf
c delays (and the cost of toll
collection). Examples of bridges and tunnels that collect tolls in one direction of
travel include the Golden Gate and San Francisco Bay Bridges, on the Hudson
River Crossings in the New York Metropolitan area.
16.8 Changeable Lane Assignments
“
is a term describing reversible lanes, roads and
ramps that provide cost-effective means of accommodating the tidal variations in
traf
Changeable lanes assignments
”
flow. Changeable lane assignments can reduce delay with a minimum
implementation costs. They usually apply to all vehicles, although sometimes they
apply just to priority vehicles (e.g., buses, taxis, carpools).
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