New Jersey Traffic Statute Guide
N.J.S.A. 39:4-105, explained.
Section 39:4-105 defines what the three traffic-signal colors mean. Its yellow-light language is not “always stop”: a driver too close to stop safely when amber appears may proceed.
The Rule
Each color carries conditions
Green permits movement subject to others' safety and any officer, sign, or special signal. Red requires stopping before the intersection or crosswalk and remaining until green appears alone unless an authorized direction permits movement.
Yellow after green requires a stop before the intersection or nearest crosswalk unless the vehicle is so close that suitable brakes cannot stop it safely. At 20 mph, the statute considers 50 feet a safe stopping distance; a vehicle within that distance that cannot safely stop may cross or turn unless the turn is specifically restricted.
What Must Be Proved
The charge is narrower than its label
- A conforming three-color signal controlled the charged movement.
- The relevant color displayed when the vehicle reached the legal decision point.
- The driver disobeyed that color's command and no officer, official sign, special signal, or yellow safe-stopping qualification applied.
MVC points: 2 for failure to stop for a traffic light under the MVC listing. That figure comes from the current MVC schedule, not an old payable-ticket table.
Fine note: This section does not state its own dollar amount. This guide therefore does not present an old Violations Bureau payable amount as the current fine.
Evidence & Defenses
Details decide these cases
Stop-line timing
Video should be analyzed frame by frame to locate the vehicle when the indication changed, not where it was seconds later.
Yellow stopping safety
Speed, distance, grade, weather, brake condition, and following traffic bear on whether a suitable-brake stop was safe.
Signal sequence
Controller logs, maintenance records, synchronized camera time, and lane-specific arrows can test the officer's claimed phase.
Request intersection video and controller records quickly. A vehicle lawfully entering on yellow does not become unlawful merely because the signal turns red before it clears.
Common Questions
Questions about 39:4-105
Must I stop the instant a light turns yellow?
Not if the vehicle is so close that it cannot be stopped safely with suitable brakes. The statute expressly states that qualification.
Is 50 feet always the yellow-light rule?
No. The 50-foot benchmark is expressly tied to 20 mph. Actual speed and safe stopping remain important.
Does green give absolute right of way?
No. Green permission remains subject to others' safety and directions from an officer, official sign, or special signal.
Primary Sources
Read the official material
The explanation above was checked on September 5, 2026 against the New Jersey Legislature's official bulk text (codified through P.L.2025, c.405), the Legislature's live Title 39 compilation, and the MVC's current points table. The 2026 enacted-law index was also checked for later amendments affecting this batch.
- Official Legislature lookup for N.J.S.A. 39:4-105
- Local Title 39 reference entry for N.J.S.A. 39:4-105
- New Jersey Legislature official statute-text archive
- New Jersey MVC official points schedule
Related reading: New Jersey traffic-ticket defense and the New Jersey municipal court directory.
Charged under N.J.S.A. 39:4-105?
The citation is only the start. The location, observations, video, and exact subsection determine what the State can prove.
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Source verification completed September 5, 2026 against the New Jersey Legislature bulk statutes through P.L.2025, c.405, the exact Title 39 section, and the New Jersey MVC points schedule. Primary sources: Legislature statute archive and MVC points schedule. This is source verification, not a representation of attorney review. Laws change; nothing here is legal advice for your specific case.