The third stage of the Tour of Britain set off from Hull and ended in Beverley.
The city council is asking people for their feedback on the venue's facilities and future events.
Laila Everett believes she was injected while on a night out with friends in Hull.
The number of weekly collections has increased in many areas, with more set to see the service soon.
The struggles faced by young people hooked on ketamine are featured in a new documentary.
Ex-Commonwealth lightweight champion Tommy Coyle is running the event in Hull for the seventh year.
Kate Matthews, 36, is in Hull Royal Infirmary and has been "fighting for her life" since March.
The project is designed to reduce carbon emissions and improve the city's air quality.
The race will go through Lincolnshire, East Yorkshire and North Yorkshire before ending in Scotland.
