14 reference to the amount of time when a car is not in use
15 mention of several advantages of driverless vehicles for individual road-users
16 reference to the opportunity of choosing the most appropriate vehicle for each trip
17 an estimate of how long it will take to overcome a number of problems
18 a suggestion that the use of driverless cars may have no effect on the number of vehicles manufactured
The Impact of Driverless Cars
Figures from the Transport Research Laboratory indicate that most motor accidents are partly due to 19 , so the introduction of driverless vehicles will result in greater safety. In addition to the direct benefits of automation, it may bring other advantages. For example, schemes for 20 will be more workable, especially in towns and cities, resulting in fewer cars on the road.
According to the University of Michigan Transportation Research Institute, there could be a 43 percent drop in 21 of cars. However, this would mean that the yearly 22 of each car would, on average, be twice as high as it currently is. This would lead to a higher turnover of vehicles, and therefore no reduction in automotive manufacturing.
Which TWO benefits of automated vehicles does the writer mention?
Which TWO challenges to automated vehicle development does the writer mention?