In Summer 2025, the Department of Mobility and Infrastructure will be removing the traffic signal from the intersection of Sarah Street & 23rd Street and replacing it with a four-way stop. The same will be done to the adjacent intersection of Sarah & 23rd Street. Aging signal equipment led to a traffic removal study of these intersections, which found that traffic signals are not warranted.

Beginning August 2025, the traffic signal will flash red for 30 days to introduce the all-way stop control with temporary stop signs installed. After 30 days of flash, the traffic signal will be removed and permanent stop signs will be installed. In September 2025, additional quick build curb extensions will be installed for added safety benefits.

It has long been assumed that traffic signals provide the best results for multi-modal traffic flow at an intersection.

However, the improper use of a signal, especially on low-volume local roads, can negatively impact the intersection.

Some drawbacks include:

• Excessive delay to all users
• Increased noncompliance with the signal (running red lights, etc.)
• Increased collisions

The assumption that traffic signals are the most effective form of traffic control has led to many signals being installed at locations where they are not warranted.

In fact, their presence may have adversely affected the safety and efficiency of vehicular, bicycle, and pedestrian traffic.

The intersection of Sarah Street and 23^rd Street, located in Pittsburgh’s South Side Flats neighborhood, was previously identified by DOMI as a potential location for conversion from signal control to all-way stop control. A traffic signal removal study was completed to determine if the traffic signal is still warranted at this location. This traffic study followed methodology described in the Federal Highway’s FHWA-IP-80-12 User Guide for Removal of Not Needed Traffic Signals, which provides guidance and criteria to use while evaluating traffic signals for removal. The study evaluated vehicle volumes, crash data, signal warrants, and operational performance and determined that a traffic signal is not warranted at this intersection. Based the results of the traffic signal removal study, DOMI recommended the traffic signal be removed and replaced permanently with all-way stop control.

Beginning August 2025, the traffic signal will flash red for 30 days to introduce the all-way stop control with temporary stop signs installed. After 30 days of flash, the traffic signal will be removed and permanent stop signs will be installed.