Missouri Work Zone Laws

How Missouri handles work zones

Missouri stacks surcharges instead of doubling. Any moving violation in a signed work zone adds $35, then $75 on a repeat (RSMo 304.582). With a worker present and the '$250 fine when workers present' signs up, speeding or illegal passing adds $250, then $300. Go 15+ over or blow a flagger and it's 'endangerment of a highway worker,' up to $1,000 and 4 points (RSMo 304.585). The hands-free law (RSMo 304.822) bans holding a phone statewide.

Speed, fines, phone, and the flagger

• Speed rule: Obey the posted reduced work-zone limit whenever the orange signs stand, workers or not. The base $35/$75 surcharge rides on any moving violation in the signed zone. The heavy $250-$300 add-on applies only when a highway worker is present and the '$250 fine' warning signs are posted.
• Fine multiplier: $35 added to any moving violation in a signed work zone, $75 on a repeat (RSMo 304.582). With workers present, speeding or illegal passing adds $250, then $300. No flat doubling; Missouri stacks surcharges on top of the normal fine.
• Phone in a work zone: Restricted — put it down
• Flagger authority: Obey the flagger. Failing to stop for a work-zone flagman or ignoring a work-zone traffic-control device is 'endangerment of a highway worker' (RSMo 304.585), up to $1,000 and 4 license points, and aggravated (up to $5,000 for injury, $10,000 for a death) if a worker is hurt or killed.
• Base fine: A normal speeding fine plus a $35 work-zone surcharge ($75 on a repeat). Workers present pushes the add-on to $250, then $300. Go 15+ over, pass illegally, or disobey a flagger and it becomes endangerment of a highway worker, up to $1,000 and 4 points (RSMo 304.585).

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