What additional requirement is there when swerving in a curve compared to a straight line?

When swerving in a curve, more traction is necessary compared to swerving in a straight line. This is due to the dynamics involved when navigating a curve; the combination of steering input and centrifugal force affects the motorcycle's stability and grip. In a curve, the motorcycle leans, which impacts the tire's contact patch with the road.

Having more traction in this scenario is crucial because it allows the rider to maintain better control while executing the maneuver. Proper traction ensures that the tires can stick to the road surface, preventing sliding or loss of control during the swerve. Riders need to be aware of their speed and lean angle, as excessive lean or insufficient speed can compromise traction, potentially leading to an accident. This contrasts with straight-line swerving, where the dynamics are simpler, and the vehicle does not need to contend with the effects of leaning.