Final answer:
It is true that motorists should check for bicyclists before opening their vehicle doors after parking to prevent accidents.
Step-by-step explanation:
The statement that after parking and before opening vehicle doors, a motorist should first check for bicyclists is true. This is a critical safety step to prevent what is known as 'dooring', which is when a motorist opens their car door without checking and unintentionally hits a cyclist that is passing by.
This can lead to severe injuries or even be fatal for the cyclist. Moreover, in many places, it is legally required to check for cyclists before opening a vehicle door to ensure the safety of all road users. Motorists are encouraged to practice the 'Dutch Reach' method.
The hand farthest from the door to open it which naturally turns their body to look over their shoulder and check for any oncoming cyclists.