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Missouri and Kansas roadside safety

Move Over for Emergency and Roadside Vehicles

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Start with the immediate safety decision

A stopped roadside vehicle creates a narrow work area beside moving traffic. Missouri and Kansas use different statutory language, but the safe decision starts the same way: identify the scene early, create space when a lane change is lawful and safe, and reduce speed with due caution when it is not.

Step-by-step

01

Look far enough ahead

Scan for flashing lights, hazard lamps, flares, cones, triangles, stopped traffic, workers, pedestrians, or a disabled vehicle. Early recognition gives you time to check mirrors, ease off the accelerator, and avoid an abrupt maneuver.

02

Signal and check the adjacent lane

Use mirrors and a turn signal, account for vehicles beside or behind you, and change into a nonadjacent lane only when the roadway, markings, traffic, and conditions allow it safely. Do not swerve or force another driver out of position.

03

Slow with due caution when you cannot move over

If a safe lane change is impossible, reduce speed and maintain a speed appropriate for road, weather, traffic, sight distance, and the people or vehicles at the roadside. Leave additional space and be prepared for a worker, door, debris, or vehicle movement.

04

Follow scene control

Obey law-enforcement officers, flaggers, signs, cones, arrow boards, lane-control signals, and temporary traffic patterns. A tow truck or disabled vehicle may be only one part of a larger crash, fire, utility, maintenance, or recovery scene.

05

Remove distractions

Do not photograph, record, stare at, or use a phone while passing the scene. Keep both hands ready, increase following distance, and watch the traffic path—not the incident itself.

06

Protect the space after passing

Return to the original lane only after you have completely cleared the scene and can do so safely. Do not accelerate aggressively, cut off another vehicle, or reduce the space the next driver needs to move over.

What to know or prepare

Missouri stationary-light rule

Missouri section 304.022 addresses stationary vehicles displaying specified red, blue, amber, or white warning-light combinations and directs a safe nonadjacent-lane change when possible or due caution and reduced safe speed when it is not.

Kansas stationary-hazard rule

Kansas section 8-15,116 addresses a stationary vehicle displaying hazard warning lamps, road flares, or caution signals such as cones, signs, or reflective triangles and requires a safe lane change or due caution and reduced safe speed according to roadway conditions.

Conditions that change the maneuver

Lane count, traffic beside you, work zones, ramps, curves, weather, visibility, pavement, vehicle size, motorcycles, trailers, and directions from officers or flaggers.

People at the roadside

Tow operators, police, firefighters, medical personnel, highway and utility workers, drivers, passengers, and pedestrians may step or work near the lane edge.

Important limits

  • This article summarizes selected current safety provisions and is not legal advice; read the statutes and follow official directions for the actual roadway and scene.
  • A move-over rule never requires an unsafe, illegal, or abrupt lane change; due caution and safe speed remain essential.
  • Do not assume every colored light, parked vehicle, or worker has the same legal status in both states, or that one state's wording applies across the state line.
  • Road, weather, emergency, and construction conditions can require a more cautious response than the minimum statutory language.

Questions drivers ask

Does Missouri's rule include tow trucks?

Missouri section 304.022 defines an emergency vehicle to include a wrecker or tow truck while performing emergency service and sets duties for drivers approaching certain stationary vehicles displaying specified warning lights. The actual lights, roadway, service, and circumstances matter.

Does Kansas cover an ordinary disabled vehicle with hazard lights?

Kansas section 8-15,116 applies to a stopped, standing, or parked vehicle displaying hazard warning lamps, road flares, or caution signals including cones, caution signs, or reflective triangles. Review the current statute for its exact requirements and exceptions.

What if traffic prevents a safe lane change?

Do not force the maneuver. Both the Missouri and Kansas provisions describe proceeding with due caution and reducing speed to a safe level when a lane change is unsafe, impossible, or unavailable under the specified conditions.

Should I stop next to the roadside vehicle to offer help?

Usually not on a high-speed or active roadway unless an emergency or official direction requires it. An unnecessary stop can create another hazard and block access for responders. Call 911 for immediate danger and continue safely clear of the scene.

Official and primary resources

Missouri Revised Statutes § 304.022

Current Missouri statutory language for approaching specified stationary vehicles and the emergency-vehicle definition that includes certain tow-truck emergency service.

Kansas Statutes § 8-15,116

Current Kansas statutory language for passing a stationary vehicle displaying hazard warning lamps, flares, cones, signs, or triangles.

NHTSA Move Over: It's the Law

Federal safety campaign explaining the basic move-over or slow-down decision near vehicles displaying flashing lights.

External resources are provided for convenience. Tommy's is not affiliated with, endorsed by, or acting on behalf of those organizations.

Related guides

Safety first.

If anyone is injured, in immediate danger, facing a fire or hazardous spill, or blocking an active traffic lane, call 911 first. Move only when you can do so without entering traffic or increasing the danger.

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