Interpretation ID: nht73-5.23

DATE: 09/20/73

FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA

TO: Auto Safety Research Center

TITLE: FMVSS INTERPRETATION

TEXT: This is in response to your letter of June 27, 1973, which requests information on the requirements of Standard 206, Door Locks and Door Retention Components, and suggests that door locking mechanisms should prevent operation of the inside and outside handles latch release controls) of both front and rear doors.

The standard presently requires that engagement of the front-door locking mechanism on passenger cars, multi-purpose passenger vehicles, and trucks render the outside door handle (latch release control) inoperative. On passenger cars and multipurpose passenger vehicles, engagement of the rear-door locking mechanism must render both inside and outside handles inoperative. Your suggestion that inside front door handles also be rendered inoperative was proposed in 1967 as an initial standard, but it was determined at that time that ease of escape in the event of accident made one-step operation of the door more desirable. It was concluded that the vehicle operator would have sufficient control over children in the front seat to permit such override operation.

We are still interested in the best arrangement of locking mechanisms and override at the various seating positions. At the moment, available accident data does not justify further rulemaking. Your comments will be fully considered in the event we decide to take further action.

AUTO SAFETY RESEARCH CENTER

June 27, 1973

U.S. Department of Transportation

Dear Sir;

We were under the impression that, since about 1968, an automobile door, once locked, could not be opened from either the outside or inside, unless it was subsequently unlocked, and that there were Federal regulations to this effect. However, at least on some 1973 cars, the doors can be opened from the inside, even while locked, and a number of people have come to us both surprised and concerned that children and others can open a supposedly locked door.

Please advise us if there is indeed a Federal regulation concerning door lock operation. If there is no regulation to the effect that the door handles, both inside and outside, are rendered inoperative when the door is locked, then may we suggest that, from a safety standpoint, such a regulation should be adopted as soon as possible.

Sincerely,

Delbert A. Russell, Jr. Director