Two-Up Crossing a Steel-Grate Bridge in Crosswind
You are riding a touring motorcycle with a passenger on a two-lane bridge posted 55 mph. The deck is steel grate with expansion joints every 50 feet, and a crosswind is gusting to about 25 mph from your left. You are following a car at a two-second gap. An oncoming box truck is approaching, and the bridge has no shoulder-only a low concrete rail. Your passenger has been leaning with you but shifts slightly as the first gust hits. The bike feels unsettled, and your front wheel is near a longitudinal grate seam. Traffic is light, but stopping on the bridge is not an option. The far end of the bridge is about 300 feet ahead, and the road curves right after the bridge.
1. What lane position and speed adjustments should you make before and on the bridge?
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Before the bridge, reduce speed below the 55 mph limit and open the following gap from two seconds to at least four. The steel grate, expansion joints, and crosswind all reduce the margin for smooth inputs, and the oncoming box truck will add a sudden wind blast. A four-second gap gives you time to react without braking hard on steel.
On the bridge, ride in a wheel track rather than on the center seam-generally the left track here, because the wind is from the left and you want room to drift right without touching the rail. Keep steady throttle and a relaxed grip. Do not brake on the grate unless absolutely necessary; if you must slow, do it before the bridge or after the joints. Cross expansion joints as squarely as the lane allows, and look toward the far end rather than at the seam.
2. How should you manage the passenger and the controls when the gust hits?
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Tell the passenger before the bridge to keep still, look over your shoulder in the direction of the turn, and lean with the bike rather than against the wind. A passenger who sits upright or shifts suddenly changes the bike's balance exactly when the crosswind is already pushing it. If the passenger shifts as the gust hits, do not correct with a jerk; let the bike move slightly and make a smooth countersteer.
Keep the controls smooth: steady throttle, knees gripping the tank, loose arms. Do not chop the throttle or grab the brake. The gust may push you toward the right, so having started in the left track gives you room to absorb it. The oncoming truck's wind blast will be brief but strong; expect it and avoid being mid-brake or mid-steer when it arrives.
3. Why is braking or steering abruptly on the grate dangerous, and what is the plan to the far end?
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Steel grate offers less traction than asphalt, and the expansion joints and longitudinal seams can upset the tires if they are loaded abruptly. Hard braking on the grate can lock a wheel or trigger a slide, especially with a passenger adding weight. Sudden steering can make the front tire skip across a seam. The crosswind already requires the tires to hold a slight slip angle, so adding a sharp input leaves little reserve.
The plan is to hold a steady line and speed to the far end, about 300 feet ahead, then set up for the right curve after the bridge. Look through the bridge to the road beyond, keep the passenger settled, and make any speed adjustment before the curve rather than on the steel. If a gust pushes you offline, correct gently and let the bike settle.