Two Seconds Behind a Loaded Flatbed
You are riding a sport-touring motorcycle northbound on Interstate 35 at 65 mph in the right lane. Ahead is a flatbed truck carrying unsecured sheets of plywood; the top sheet is lifting in a crosswind. You are about two seconds behind the truck and have been following for about a mile because the left lane has been full. Traffic in the left lane is dense, with a minivan alongside your rear wheel. The truck's left rear tire throws a strip of tread into your lane about 80 feet ahead. Your motorcycle has ABS. The shoulder on the right is narrow and has a guardrail. The truck driver does not signal and continues at 65 mph.
1. Evaluate your two-second following distance at 65 mph. Show the arithmetic and explain what it leaves you.
Read the worked answer
At 65 mph, the motorcycle covers about 95 feet per second (65 x 1.47 = 95.5). A two-second gap is therefore about 190 feet.
A typical perception-and-reaction time of one second uses about 95 feet before the brakes are applied, leaving roughly 95 feet for actual braking. That is not enough space to stop from 65 mph, especially with a hazard that appears suddenly. The two-second gap also puts you directly in the truck's debris path and gives you little time to choose an escape route. A four-second gap would be about 380 feet and would leave room to see around the load and react.
2. The tread strip is 80 feet ahead. Compare braking and swerving, given the minivan and guardrail.
Read the worked answer
At 95 feet per second, 80 feet is less than one second of travel. There is no realistic chance to stop before the debris. Braking with ABS can reduce impact speed, but it will not eliminate the strike.
Swerving left is blocked by the minivan. Swerving right aims at a narrow shoulder and a guardrail, which is a worse hazard than a tread strip. The best option is to brake firmly and squarely with ABS while staying in your lane, aim for the least dangerous part of the debris, and keep the bars straight. After the impact, check for damage and move away from the truck when the left lane opens. Do not swerve into a guardrail to avoid a piece of tread.
3. What following strategy should you use for the rest of the trip?
Read the worked answer
Drop back to at least four seconds, and more if the load is shifting or visibility is poor. Use a lane position that lets you see past the truck without sitting in its blind spot, and watch the load and tires, not just the road ahead. When the left lane clears, pass promptly and do not linger alongside.
If a driver behind is tailgating, do not shorten your following distance to 'make room.' Maintain your escape space and let the tailgater pass when safe. The core lesson is that following distance is your reaction time plus your stopping distance; two seconds at highway speed is only enough to begin reacting, not enough to avoid a hazard.