Group Ride and a Blind Crest
You are third in a group of five riders on a two-lane rural road with a 100 km/h limit. The lead rider is faster than you and has just disappeared over a blind crest. The rider directly ahead of you is following closely, about one second behind. You are being pressured to keep up. The road beyond the crest is unknown to you, and there is a farm driveway just past it. Your rear tyre is slightly under pressure and the road has patchy gravel near the edge.
1. Explain the hazards created by the group dynamics and the blind crest, and state your speed and spacing decisions.
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Group pressure: the urge to keep up with a faster lead rider is one of the most common causes of group crashes. The lead rider's pace is not a target; each rider must ride their own ride. The rider one second behind you is too close, which removes your braking margin and their reaction time.
Blind crest: you cannot see what is beyond it, and a farm driveway just past the crest means a slow or stationary vehicle, or one entering the road, could be hidden. You must be able to stop within the distance you can see to be clear, so speed must drop before the crest, not after.
Decisions:
- Reduce speed to roughly 70-80 km/h on the approach so you can stop if the road beyond is blocked.
- Increase your following distance to at least three seconds, and let the rider behind you know by easing off rather than braking sharply.
- Do not attempt to close the gap to the lead rider over the crest.
- Keep to a lane position that avoids the gravel near the edge.
2. How do the under-inflated rear tyre and the gravel affect your plan, and what would you do about the group?
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Under-inflated rear tyre: low pressure makes the tyre run hotter, reduces its grip and changes the bike's steering and braking behaviour. On a crest where you may need to stop quickly, that is a real deficit. Check and correct pressures before continuing, and if the tyre is damaged, stop and get it repaired rather than pushing on.
Gravel near the edge: gravel offers very little grip and can pull the front wheel. Keep your lane position away from the edge, especially through the crest where you cannot see the surface ahead.
The group: the safe choice is to ride at your own pace and let the group split. Agree a regroup point before the next section, or ride to a meeting place. Do not chase. A rider who arrives late is better than one who crashes trying to keep up. If the pressure continues, ride alone or with riders who match your pace.