Montgomery County expands Vision Zero cuts to neighborhood speed limits, cites safety data

County Executive Mark Elrich said Montgomery County has reduced posted speed limits on 33 residential roads since July 25 and has lowered limits on more than 250 neighborhood streets since 2021 as part of a Vision Zero push to reduce serious injuries and fatalities. "There have been 26 fatal crashes, including nine pedestrians, compared to 24 fatal crashes at this point last year," Elrich said, noting the Maryland Highway Safety Office's data on crash survivability by speed.

Elrich cited House Bill 562 as enabling municipalities to set limits as low as 20 miles per hour and, in rare circumstances, 15 mph on local roads. He highlighted the effect of speed on pedestrian survival: "A pedestrian struck at 30 miles per hour has a 40 percent chance of a serious injury or death. But at 20 miles an hour, that risk drops significantly to 10 percent," he said.

Wade Holland, the county's Vision Zero coordinator, described how streets are selected and what engineering treatments the county considers. "We get inputs from different sources... a lot of those come from the residents themselves saying we have a speeding problem," Holland said, and added that traffic engineers conduct field studies and apply context‑sensitive and complete‑streets guidelines before changing speed limits or adding calming measures such as speed humps or curb extensions.

Holland said additional reductions are "in the works" with possible rollouts as early as August and later into September or October, and promoted a statewide public-education campaign, SlowTheFastDown, as a resource for media and residents. The county also said it will pair lower posted limits with enforcement strategies, including targeted patrols and automated enforcement where appropriate.

Officials emphasized that speed‑limit reductions are only one tool among engineering and enforcement efforts meant to make neighborhood streets safer for pedestrians, cyclists and drivers.