Is lane splitting legal in Arizona?
Short answer
No. Lane splitting has long been prohibited in Arizona, and as of September 12, 2026, HB 2941 classifies it as reckless driving — a more serious violation than before.
No — and as of September 12, 2026, the consequences changed. Arizona law has long prohibited lane splitting (riding a motorcycle between lanes of traffic moving in the same direction). House Bill 2941, effective September 12, 2026, now classifies lane splitting as reckless driving, which is a more serious violation than the prior treatment.
A few distinctions help here, because the terms get mixed up:
Lane splitting — riding between lanes of moving traffic. Prohibited, and now classified as reckless driving.
Lane filtering — Arizona does allow a narrow form of filtering in limited circumstances: moving between stopped vehicles on certain roads at low speed. The conditions are specific, and the new law does not change filtering — it addresses splitting between moving traffic.
Sharing a lane side by side — two motorcycles may ride side by side in a single lane; a car and a motorcycle may not share one.
For riders, the reclassification raises the stakes of a maneuver that was already prohibited. For anyone involved in a crash where lane position is disputed, the distinction between lawful filtering and prohibited splitting can matter, because Arizona assigns fault in percentages under pure comparative negligence — the specific facts of where each vehicle was and what the law allowed at that spot are exactly what gets examined.