Final answer:
The correct answer is B) Shared by bicyclists and motorists. Sharrows are road markings that indicate a lane is to be shared between cyclists and drivers, promoting safer coexistence on the road.
Step-by-step explanation:
The question 'Sharrows mark traffic lanes that are:' relates to traffic lane designations and road safety measures in urban planning. The correct answer to this question is B) Shared by bicyclists and motorists. Sharrows, or shared lane markings, are road markings used to indicate a lane that is shared by both bicyclists and motorists. They are meant to guide bicyclists to the best position to ride and to remind motorists that they must share the road with cyclists. The term 'sharrow' is a portmanteau of 'share' and 'arrow', suggesting both direction for cyclists and the idea of sharing the road. While some lanes might be reserved for high occupancy vehicles (option A), and others may be designated for left turns (option C), sharrows are specifically meant to facilitate a safe interaction between motorists and cyclists on the road. This is particularly crucial in busy cities where pedestrians and cyclists may need to navigate through traffic to reach their destinations or cross intersections with safety concerns. Sharrows help address these safety concerns by making road usage clearer to all involved parties.