Which type of road usage can increase collision risk, especially when turning?

Choosing all of the above is appropriate because each listed scenario contributes to an increased risk of collisions, particularly during turning maneuvers.

When pedestrians are crossing, drivers need to be vigilant and often stop or yield, which can lead to unexpected changes in speed or trajectory that could result in collisions. Heavy traffic can create a situation where vehicles are closely packed together, making it difficult for drivers to judge distances and gaps when turning, increasing the likelihood of accidents. Additionally, bicycles sharing the lane with motor vehicles can present unique challenges; drivers may have to maneuver carefully to accommodate cyclists, which can lead to miscalculations and potential collisions during turns.

Understanding how each of these factors contributes to collision risk helps drivers develop safer driving habits and strategies to navigate these situations more effectively.