Final answer:
In heavy traffic, it's advisable to travel 3-4 mph less than surrounding vehicles for safety and to have more reaction space.
Step-by-step explanation:
When driving in heavy traffic where you are unable to maintain a safe following distance, the best option is to travel at 3-4 mph less than the surrounding vehicles. This allows you more space to react to sudden stops or changes in traffic flow. It is always important to prioritize safety over speed, especially in congested traffic conditions, to prevent collisions and ensure the safety of everyone on the road.