"Delivery workers now move faster than just about anything else in the city. They keep pace with cars and weave between them when traffic slows, ever vigilant for opening taxi doors and merging trucks. They know they go too fast, any worker will say, but it’s a calculated risk. Slowing down means being punished by the apps."

https://www.theverge.com/22667600/delivery-workers-seamless-uber-relay-new-york-electric-bikes-apps