Vehicle platoon dispersion affects which aspects of traffic flow?

• A. Parking demand
• B. Weather sensitivity
• C. Capacity and Level of Service
• D. Pedestrian wait times.

Answer: (C)

Platoon dispersion is about how evenly spaced the vehicles in a platoon are as it moves. When the headways are uniform and tight, the platoon acts like a compact, predictable moving block, which can push a higher number of vehicles through a point in a given time — that is, a higher capacity. It also tends to keep speeds more consistent and reduces fluctuations, so the overall traffic performance at a given density is better, which corresponds to a higher Level of Service.

If dispersion increases and headways vary a lot, disturbances grow, speeds become less uniform, and the effective space between vehicles grows on average. This lowers the achievable flow rate and degrades service quality, leading to a worse Level of Service. So, platoon dispersion directly influences how much traffic can move through and how smoothly it does so.

Other options don’t capture the main impact of dispersion on traffic flow: parking demand relates to land use and trip generation, weather sensitivity and pedestrian wait times involve broader conditions beyond how a platoon’s spacing behaves.