Other road users need to be extra careful around trucks because
- they have large blind spots ✓
- they have less effective braking system than cars do
- they carry more weight than cars
- their lights are so high up that they are hard to see
Answer: A. they have large blind spots
Other road users need to be extra careful around trucks because trucks have large blind spots both behind and beside them.
Why this is the answer
The handbook points out that large vehicles have big blind spots at the back and along the sides, so a truck driver may simply not see you if you sit in one of those areas. That is why you should keep out of those zones, and you can check yourself by making sure you can see both of the truck's mirrors. Because the driver's view of you is blocked there, other road users have to take extra care.
Why the other answers are wrong
- B. they have less effective braking system than cars do — The passages never compare truck brakes with car brakes, so there is nothing here saying a truck's braking system works less well.
- C. they carry more weight than cars — While the passages mention that trucks are long and may pull two trailers, weight is not given as the reason other road users must be extra careful.
- D. their lights are so high up that they are hard to see — The passages do not say anything about truck lights being mounted high or being hard to see.
Remember it
If you cannot see the truck driver's mirrors, the driver cannot see you.