What key factor should be considered when planning a route for a tanker?

When planning a route for a tanker, considering weight restrictions and potential hazards is crucial. Tanker trucks are often heavily loaded, which means they must comply with various weight limits imposed by bridges, roads, and local regulations. Exceeding these limits can lead to fines and damage to infrastructure.

Additionally, potential hazards such as sharp turns, steep grades, and areas with high pedestrian traffic must be taken into account to ensure safe operation of the vehicle. These factors not only affect the safety of the driver and vehicle but also influence the overall logistics of transporting hazardous materials. Understanding and planning for these aspects can significantly enhance safety and compliance during transit, which is vital for anyone handling tankers. The other options may contribute to planning, but they do not hold the same level of importance in the context of safety and regulatory compliance for tankers.