What is the primary purpose of signal priority in traffic operations?

The primary purpose of signal priority in traffic operations is indeed to accommodate transit vehicles within the normal signal operation. This approach is aimed at enhancing the efficiency of public transit systems by allowing buses or other transit vehicles to receive either green lights or extended green phases when they approach intersections. By improving the ability of transit vehicles to move through intersections more efficiently, signal priority helps reduce delays for these vehicles, making public transportation a more attractive option for commuters.

Moreover, signal priority is a strategic approach that helps in managing road space effectively, as it helps integrate transit with other traffic flows rather than making it a nuisance or causing excessive delays. This leads to a more reliable schedule for transit services, which can encourage greater usage of public transportation, thereby contributing to overall traffic management goals.

The other options, while they may have relevance in traffic signal operations, do not encapsulate the primary intent behind the implementation of signal priority. Bypassing traffic signals for emergency vehicles, improving overall traffic flow for all vehicles, and increasing waiting times all address different aspects of traffic management or specific needs but do not reflect the main objective of signal priority concerning public transit systems.