Disproportionate weight in vehicles would still heighten the risk of fatalities in a crash, but the new improvements lessen risk in vehicles of equal weight, which means that S.U.V.
The army also wants to buy medium-weight armoured vehicles to replace existing equipment, some of it built in the 1960s.
Also, the test is done without air-conditioning, which reduces fuel economy, and without any popular options that add weight to vehicles, thereby making them less efficient.
It said an engineering inspection carried out in 2011 found it had "deteriorated significantly", and the maximum weight of vehicles was reduced from 18 to 7.5 tonnes.
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In addition to the growth in light trucks and cars, sales for heavy trucks and truck trailers have risen, and there, too, fuel standards will mean more aluminum will be used to lessen the weight of the vehicles.
Lorry Watch was set up by residents who were fed up of vehicles exceeding the weight limit on the bridge which takes the A363 over the River Avon.
Weight gain of passengers in noncommercial vehicles could account for nearly 1 billion gallons of gasoline consumed per year in the United States from 1960 to 2002, Allstate says in an infographic accompanying its blog post.
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Europe has its own regulations which will also mean a bigger push to use aluminum in vehicles to make them lighter weight.
Toyota is one of several heavy-weight car manufacturers and technology companies researching autonomous vehicles.
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As automakers shave every extra ounce from new vehicles to boost fuel economy, a weight problem of a different sort could be thwarting their efforts.
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Which vehicles do you think strike the best balance between weight and ease of handling for a new driver?
The scheme would see volunteers patrol the town's bridge, where there is a 17.5 tonne weight limit, to record the registration plates of any offending vehicles.
Under normal circumstances, designers of mega yacht tenders are faced with restrictions in height, weight and the space they occupy leading to compromises in the vehicles the guests use as transport and for play.
The strong showing of conventional vehicles in the top twelve is a testament to how serious manufacturers have gotten about recasting these vehicles as fuel-sippers with transmission refinements, weight savings, and sophisticated internal combustion engines.
The performance of these vehicles, which is often astounding given their size and weight, owes a lot to small engineering improvements made, in many cases, for other reasons.
Technologies on display ranged from solar powered water purification units to military vehicles using next generation materials and energy sources to light weight batteries that can give better range and endurance.
Johanson of Solar Electric Vehicles said he'd like to see Toyota bring the weight of a Prius down from 3, 000 pounds to 2, 000.
Because of their size and weight, it would be prohibitive to have a spare for the performance wheels and tires on many of these vehicles.
The weight limit on London Road Bridge has been reduced to 7.5 tonnes from 18 tonnes, but emergency vehicles will still be able to use the bridge.
The Defense Department has consistently pursued solutions to lighten the load, from exoskeletons to unmanned vehicles that would serve as "pack mules, " to the elusive quest for higher power, lower weight batteries.
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