Final answer:
The statement regarding the limits on vehicle dimensions and weight on Ontario highways is true. These regulations are enforced for safety and traffic management.
Step-by-step explanation:
There are indeed limits to the length, width, height, and weight of vehicles that can travel on Ontario highways. The statement is true. These regulations are in place to ensure safety, maintain infrastructure, and allow for the smooth flow of traffic. For example, there are specific limits for each type of vehicle (like passenger vehicles, commercial trucks, etc.), and exceeding these limits can result in fines or require special permits.