Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
Road traffic is increasing worldwide. 1 _______. However, engineers are working on Advanced safety vehicles (ASVs) which will be much safer for drivers, other road users such as cyclists, and for pedestrians. 2 _______. ASVs will be equipped with electronic sensors to prevent accidents and to make it safer for people when accidents do happen. 3 _______. Others will warn drivers when they are too close to other vehicles.
4 _______. Electric motors are very efficient and produce no pollution, but they need heavy batteries and their range is limited with current technology. Hybrid cars have both a petrol engine and an electric motor. They save about 15% of fuel. They need batteries but they don’t have to be charged overnight as the motor acts as a generator when the car brakes. Liquefied petroleum gas (LPG) is already used as a fuel. Cars can be converted easily but LPG only cuts down pollution a little. Hydrogen fuel cells may be the long-term answer. They provide clean power but each cell is very expensive.
This increase brings problems: road accidents, congestion, and pollution.
They are also working on new engines which use cleaner fuels.
One sensor will stop the driver falling asleep.
The car of the future might be electric.