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NTSB Safety Recommendations H-10-001 through -007


National Transportation Safety Board
Washington, DC 20594

July 08, 2010

NTSB Safety Recommendations H-10-001 through -007


The National Transportation Safety Board makes the following new
recommendations to the National Highway Traffic Safety Administration:

Require new commercial motor vehicles with a gross vehicle weight rating
above 10,000 pounds to be equipped with lane departure warning systems.

To maintain consistency in bus body classifications and to clarify the
scope of bus safety initiatives, develop regulatory definitions and
classifications for each of the different bus body types that would
apply to all U.S. Department of Transportation agencies and promote use
of the definitions among the bus industry and state governments.
(H-10-02) (This recommendation supersedes Safety Recommendations H-99-43
and -44 and is classified "Open-Unacceptable Response.")

In your rulemaking to improve motorcoach roof strength, occupant
protection, and window glazing standards, include all buses with a gross
vehicle weight rating above 10,000 pounds, other than school buses.

Develop performance standards for all newly manufactured buses with a
gross vehicle weight rating above 10,000 pounds to require that overhead
luggage racks are constructed and installed to prevent head and neck
injuries and remain anchored during an accident sequence. (H-10-04)
(This recommendation supersedes Safety Recommendations H-09-23 and -24.)

Develop stability control system performance standards applicable to
newly manufactured buses with a gross vehicle weight rating above 10,000
pounds. (H-10-05)

Once the performance standards from Safety Recommendation H-10-05 have
been developed, require the installation of stability control systems in
all newly manufactured buses in which this technology could have a
safety benefit. (H-10-06).

Require that all buses above 10,000 pounds gross vehicle weight rating
be equipped with on-board recording systems that: (1) record vehicle
parameters, including, at minimum, lateral acceleration, longitudinal
acceleration, vertical acceleration, heading, vehicle speed, engine
speed, driver's seat belt status, braking input, steering input, gear
selection, turn signal status (left/right), brake light status (on/off),
head/tail light status (on/off), passenger door status (open/closed),
emergency door status (open/closed), hazard light status (on/off), brake
system status (normal/warning), and flashing red light status (on/off;
school buses only); (2) record status of additional seat belts, airbag
deployment criteria, airbag deployment time, and airbag deployment
energy; (3) record data at a sampling rate sufficient to define vehicle
dynamics and be capable of preserving data in the event of a vehicle
crash or an electrical power loss; and (4) are mounted to the bus body,
not the chassis, to ensure recording of the necessary data to define bus
body motion. (H-10-07) (This recommendation supersedes Safety
Recommendation H-99-53 and is classified "Open-Unacceptable Response.")




The complete recommendation letter is available on the Web 
at the URL indicated above.

The letter is in the Portable Document Format (PDF) and can 
be read using the Acrobat Reader 5.0 or later from Adobe 
An archive of recommendation letters is available at 
Electronic versions of letters may or may not include enclosures;
however, related publications, accident 
briefs, and aviation accident synopses may be found 
on the NTSB website.


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