Final answer:
Tankers carrying explosives labeled as 'A' or 'B' (equivalent to Division 1.1, 1.2, or 1.3) should not be parked within 300 feet of the traveled part of the road to ensure safety.
Step-by-step explanation:
The question pertains to specifications for parking a tanker carrying explosives, which relates to regulations and safety protocols in transportation. Although the question doesn't specify the exact distance, the general guideline is that a tanker carrying explosives classified as Division 1.1, 1.2, or 1.3 (which are explosives "A" or "B") should not be parked within 300 feet of the traveled part of the road, according to the Federal Motor Carrier Safety Regulations (FMCSR). This is to ensure the safety of both the driver and the public in case the explosives were to accidentally detonate or catch fire. The regulation helps to minimize potential damage and allows for the safe evacuation of the surrounding area.