When riding over metal bridge gratings, you should:

Riding straight across metal bridge gratings is the best approach because it minimizes the chance of losing control of the motorcycle. When you go straight over the grating, both tires maintain consistent contact with the surface, which helps ensure stability and traction. This technique prevents the motorcycle from sliding or slipping, which can occur if you ride at an angle or swerve.

Approaching the grating at an angle could cause the tires to catch on the edges, leading to instability. Slowing down significantly may be unnecessary and could compromise your balance, particularly if you are already negotiating a bridge's potential crosswinds. Swerving to dodge the grating might lead to unpredictable maneuvers, increasing the risk of losing control. Therefore, riding straight across is the most effective technique for safely navigating such obstacles.