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Bill

S 2497

Requires posted speed limit on certain limited access highways be based on speed at which 85 percent of vehicles are traveling; designated as Speed Limit Sanity Act.

2026-2027 Regular Session

New Jersey bill ties highway speed limits to where 85% of vehicles naturally travel rather than posted limits, aiming to improve compliance and safety alignment.

Introduced in the Senate, Referred to Senate Transportation Committee
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Bill Summary · S 2497

Legislative bill overview

S 2497 would require speed limits on certain limited access highways in New Jersey to be set at the speed at which 85% of vehicles naturally travel, rather than arbitrary posted limits. This approach, called the "85th percentile method," is based on traffic engineering research suggesting that most drivers self-select safe speeds based on road conditions. The bill applies specifically to limited access highways (interstate and state highways).

Why is this important

Speed limit enforcement and compliance is a persistent public safety challenge. If speed limits are perceived as unreasonably low relative to actual driving patterns, compliance drops and enforcement becomes difficult. This bill attempts to align posted limits with observed driver behavior, potentially improving both safety and traffic flow. However, it represents a significant philosophical shift from top-down speed limit setting to data-driven limits.

Potential points of contention

  • Public safety concerns: Critics worry that 85th percentile limits could increase speeds in populated areas or near schools, potentially raising serious injury/fatality risks despite the engineering theory behind the method
  • Revenue implications: Lower speed limits typically generate traffic citations and fines; this bill could reduce municipal and state enforcement revenue
  • Applicability disputes: Debate over which highways qualify as "limited access" and whether the 85th percentile method is appropriate for all such roads regardless of surrounding development or crash history

Compiled from official sources — confirm details with the bill’s official record.

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