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Communities throughout the country are looking at converting their
old four-lane downtown highways into new three-lane urban roadways.
There are a number of very important reasons to consider a Broadway
Road Diet as it is often called including enhanced business
access, safety, and increased downtown vitality.
At first glance, it would seem obvious that removing travel lanes
from Broadway would create congestion with a loss of capacity for
moving cars through Missoula. But what we see downtown is the inside
lane of the four-lane street being used as a left turn lane thereby
limiting its use as a through lane. The curb lane handles
most of the through traffic because the street has no left turn
lane. Therefore, a three-lane street with a left turn lane handles
about the same volume of traffic as a four-lane street. A three-lane
design could enhance the ability to make left turns at both street
intersections and business driveways.
A three-lane street is generally safer than a four-lane road, resulting
in a reduction in the rate of accidents. This is due in part due
to reduced speeds, reduced variation in lane speeds, and less speeding.
Conflict points for drivers are reduced and the sight distance
for intersection turning movements is increased. A Broadway road
diet would allow space for new bicycle lanes through downtown. A
three-lane street reduces the crossing distance where pedestrians
are exposed to moving traffic, and can create a refuge island where
a pedestrian can wait for a gap in traffic to complete their crossing.
One of the side affects of a downtown road diet is enhanced business
vitality. Better pedestrian and bicycle accessibility, along with
a safer street for drivers can add up to a more vibrant downtown
Missoula.
For the reasons mentioned above the City Public Works Department
is working with the Montana Department of Transportation to consider
converting Broadway to a three-lane from Madison Street to the California/Toole
Street intersection. The Missoula Downtown Association, along with
the Parking Commission and Missoula Redevelopment Agency are key
constituents for this project. If you are interested in commenting
please contact the Missoula City Engineer, Steve King at 523-4620,
or by e-mail at sking@ci.missoula.mt.us.
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