Motoring Technology
2 million road deaths worldwide occur each year,plus a further 50 millioninjuries.To reduce car crash rate,much research now is focused on safety andnew fuels-though
some electric vehicle and biofuel research aims at going faster.
Travelling at speed has always been dangerous.One advanced area of research inmotoring safety is the use of digital in-car assistants.They can ensure youdon't miss
important road signs or fall asleep .Most crashes result from human and notmechanical faults.
Some safety developments aim to improve your vision.Radar can spot obstacles infog,while other technology"sees through"big vehicles blocking yourview.
And improvements to seat belts , pedal（脚踏）controls and tyres are makingdriving smoot- her and safer. The colour of a car has been found to be linkedwith safety,as
have,less surpris- ingly,size and shape.
But whatever is in the fuel tank,you don't want a thief in the driving seat andthere have been many innovations（创新）.Satellite trackingand remote communications can
also come into play if you crash,automatically calling for help.
Accidents cause many traffic jams,but there are more subtle interplays betweenvehicles that can cause jams even on a clear but busy road.Such jams can beanalyzed using
statistical tools.
Robotic drivers could be programmed to make traffic flow smoothly and willperhaps one day be everyone's personal chauffeur（司机）,buttheir latest efforts suggest that
won't be soon.

According to the second paragraph,most road accidents happen dueto______.

A..heavy traffic

B.human mistakes

C.engine failure

D.bad weather