MISSOURI HIGHWAY PATROL
Service - Courtesy - Protection
Bulletin No. 91-92
DATE: February 1, 1995
TO: All Missouri Law Enforcement Agencies
All Motor Vehicle Dealers
FROM: Missouri Highway Patrol
SUBJECT: Automobile Dimmer Switches Required
- Pursuant to the Missouri Department of Motor Vehicle Act No. 91-92, all
motor vehicles sold in the State of Missouri after February 1, 1995, will be
required to have the headlight dimmer switch mounted on the floorboard. The
dimmer switch must be mounted in a position accessible to operation by
pressing the switch with the left foot. The switch must be far enough from
the left foot pedals to avoid inadvertent operation or pedal confusion.
- Included in the Act, and beginning February 1, 1995, all other vehicles
with steering column dimmer switches must be retrofitted with a floorboard
mounted dimmer switch of the type described in section 1 above. The steering
column mounted dimmer switch must be disabled or removed from the vehicle.
Vehicles which have not made this change will FAIL the forthcoming Missouri
Motor Vehicle Safety Inspection Program which is to follow.
- It is recognized that this will cause some hardship for the driving
public. However, this change is being made in the interest of public safety.
Missouri DMV Act 298-99877 will revert all Kansas operated motor vehicles to
the prevalent dimmer switch in use prior to the influx of foreign market
vehicles. A recent study entitled "Initiation Sequence in Missouri Nighttime
Motor Traffic Accidents" was conducted jointly by the Missouri Highway Patrol
and the Missouri State University, Department of Research. It has been show
that 95% of all Missouri nighttime motor vehicle accidents are the direct
result of a blonde getting her foot caught in the steering wheel while
attempting to activate a column mounted dimmer switch.