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What can ramp metering
do for I-435?
Installing ramp meters on I-435 will decrease the number of sudden weaving and braking
moments that happen as vehicles merge from onto the freeway from the on-ramps. It
will also reduce accidents and allow more vehicles to smoothly drive along the freeway.
By regulating the flow of cars, ramp meters actually allow more cars to use the
Where will the ramp meters
On I-435 between Metcalf Avenue and the Three Trails Memorial Crossing (formerly
the Grandview Triangle).
How many on-ramps will
A total of seven on-ramps will be metered on I-435 between Metcalf Avenue and the
Three Trails Memorial Crossing (formerly the Grandview Triangle). Metered ramps
include: I-435 at Metcalf Avenue, Nall Avenue, Roe Avenue, State Line Road, Wornall
Road, Holmes Road, and 103rd/104th St Connector.
How do ramp meters work?
Ramp meters work and look similar to traffic signals. Drivers must consider and
obey them as they would other traffic signals. A red light means stop, a green light
allows vehicles to proceed down the ramp and merge onto the freeway. The meters
monitor and control traffic entering the freeway during the morning and afternoon
How long will I wait
on the ramp?
Approximately one minute or so. The meters are timed according to current freeway
traffic conditions. Detectors installed in the pavement measure traffic flow and
vehicle speeds. The results are used to determine the best rate at which vehicles
can enter the freeway. Better traffic flow once on the road actually reduces your
overall commute time.
Will the number of cars
waiting on the ramps back up on to city streets?
No. The ramp meters are designed to turn off if the number of cars waiting on the
ramp grows to the point where they back up onto city streets. The meters will turn
back on once the ramp queue is reduced to a reasonable level.
How will I know if a
ramp meter is turned on?
Flashing lights located near the ramp entrance alert motorists that the ramp is
being metered and that they should be prepared to stop. Signs and road striping
also indicate where to stop and how to proceed.
Will the meters be on
all the time?
No. The meters will only be turned on Monday through Friday during the morning and
evening rush hours when the pavement sensors detect traffic congestion at the ramps.
Can I bypass the meters?
No. The meters work and look similar to traffic signals. Drivers must obey and consider
them as they would other traffic signals.
Can emergency responders
bypass the meters during emergencies?
Yes. Ramp meter signals include adequate shoulder width for emergency vehicles to
pass vehicle queues and access the freeway in emergency situations.
Are other cities using
Yes. Ramp meters are used in most major metropolitan areas across the country including
Milwaukee, Seattle-Tacoma, Portland, Phoenix, Minneapolis-St. Paul, Denver, Chicago,
and many other cities.
Will KC Scout install
ramp meters on other KC Metro freeways?
The I-435 ramp meters will be the newest addition to the KC Scout system and will
be the first in the Kansas City Metro Area. Installing meters on I-435 will introduce
the concept of ramp metering to Kansas City drivers. Successful implementation of
the program could lead to the installation of ramp meters on other Kansas City freeways.
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