NHTSA (U.S. National Highway Traffic Safety Administration) plans to issue a final rule on vehicle roof strength next spring, according to InterRegs. The rule as proposed would increase the load that could be withstood from 1.5 times the vehicle's own weight, as currently required, to 2.5 times its own weight. The current rule (Federal Motor Vehicle Safety Standard 216) applies only to vehicles up to 6000 lb; the new rule will apply to vehicles up to 10,000 lb. Congress in 2005 instructed NHTSA to issue a final rule by July 1, 2008. U.S. Department of Transportation Secretary Mary Peters earlier this month informed the appropriate congressional committees that NHTSA, which already had missed the July 1 deadline, would miss the Dec. 15, 2008, delayed deadline it had set for itself.