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A communication transmitted from Yi-An Huang, City Manager, relative to Policy Order 2022 #283, regarding the feasibility of banning turns on red signal indications
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MEMORANDUM
To:
Yi-an Huang, City Manager
From: Brooke McKenna
Acting Chief, Traffic, Parking, + Transportation Department
Date: January 18, 2023
Subject: POR 2022 #:283 Feasibility of banning turns on red signal indications
In response to the Council Order requesting a report on the feasibility of banning
vehicles from making turns on red signal indications, we report the following:
It is widely agreed upon that restricting turns on red is a significant safety improvement
for vulnerable road users and drivers in most scenarios. The act of turning on red often
requires a driver to advance into the crosswalk and/or designated bicycle area to look
for a gap in cross-traffic. When a suitable gap in traffic is identified for the turn to take
place, compliance for yielding to vulnerable road users whose space has been
encroached upon is low. Allowing turns on red shifts a driver’s attention to finding the
quickest way through the intersection and away from being aware of other road users
around them. This increases the likelihood that vulnerable road users are injured during
turns at locations where turning on red is allowed.
By default, state law permits right turns after a complete stop at a steady red signal. See
G.L. c. 89, §8. Left turns are also permitted at a steady red signal if traveling on a one-
way street and turning onto another one-way street. In addition, the law permits local
municipalities to restrict such turns by posting signage to that effect. As such, a turn on
red is permitted under state law unless a “No Turn On Red” sign is posted. Due to the
specific posting requirements under state law, the City cannot ban turns at red signal
indications solely through a change to the City’s Traffic Regulations. Instead, a “No Turn
on Red” sign must be posted at every location where such a restriction is deemed
appropriate.
Given that a wholesale ban of turns on red cannot be accomplished solely through a
change to the City’s Traffic Regulations, we propose the following to achieve the goal of
restricting turns on red at all locations other than those where such turns do not pose a
safety issue:
1. The Traffic, Parking, + Transportation Department will develop a policy that
outlines our position that most turns on red should not be permitted and details
the exceptions where such restrictions are not needed. We will make the policy
available on our website.
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2. By the end of 2023, the Department will identify and sign all locations where
“No Turn on Red’ signs are needed and not already installed, as well as
documenting any locations identified as safe for turns on red. The use of “No
Turn On Red” restrictions is already widespread in Cambridge; approximately
80% of the City’s intersections already have “No Turn On Red” signs at one or
more approaches to the intersection.
3. We will reach out to the Massachusetts Department of Conservation and
Recreation (DCR) and the Massachusetts Department of Transportation
(MassDOT) to work towards restricting turns on red at all appropriate locations
under State control.
4. A modification of the Cambridge Traffic Regulations to include a provision for a
no left turn on red regulation by removing the “right” turn specificity in the
existing regulation:
Section 4.5 Traffic Control Legend:
(c) Steady Red Signal
(2) No driver of a vehicle facing a red indication shall make [any]
a right turn where official “No Turn on Red” traffic signs are installed and
maintained prohibiting such turn.