Derbyshire Police is appealing for witnesses following a collision involving an e-bike cyclist on the A52 in Derby.
The incident was reported shortly before 10.25pm on Sunday 21 September. The cyclist collided with the steel barrier at the edge of the road and left the carriageway close to Pentagon Island. No other vehicles were involved.
The cyclist, a 19-year-old man, sustained serious injuries and was taken to hospital, where he remains.
Officers believe there were other vehicles nearby at the time and would like to hear from anyone who witnessed the incident.
Anyone with information should contact Derbyshire Police, quoting reference 26*565991, using one of the following methods:
Complete the online contact form
Send a private message through the Derbyshire Constabulary Facebook page
Call 101
Information can also be provided anonymously to the independent charity Crimestoppers by calling 0800 555