When preparing to enter the roadway from the roadside, you should position your motorcycle:

Positioning your motorcycle at an angle when preparing to enter the roadway from the roadside is beneficial for several reasons. This angle allows for better visibility of oncoming traffic, making it easier to judge the distance and speed of vehicles approaching from behind. When angled, the motorcycle's front is pointed slightly into the lane, which not only improves the rider's sightlines but also facilitates a smoother entry onto the roadway.

Additionally, this positioning helps prevent potential hazards. By being angled, the motorcycle can be more easily seen by other drivers, reducing the risk of a collision. It also allows the rider to make a more confident entry, as the bike is already oriented towards the direction of travel once it's time to merge into traffic.

Positioning the motorcycle parallel to the roadside could make it less visible and create a sharper turn when merging into traffic, while having the rear wheel touching the curb could lead to instability during the transition. Locking the rear wheel would prevent movement, making it impossible to safely enter the roadway. Thus, approaching at an angle is the safest and most effective approach when entering the roadway from the side.