A large number of flower bouquets and other tributes were placed by friends and family of the man who died following the collision between a Ford Fiesta and a Jaguar XF on Aldridge Road in Streetly on Friday evening.
The scene was a sombre one, with fragments of glass and carbon fibre still on the road and a temporary bus stop set up, after the original one had been destroyed in the collision.
Among the tributes left was a large Christmas card with a message from the man's girlfriend and other tributes from friends and people who had known the man.
One tribute described him as a brother, while promising to look after the man's family, while another said he was the "most amazing and kind young man" and one said the world could be "so cruel" and the worst things happened to the best people.
West Midlands Police said its investigations into the collision were continuing and a 51-year-old man also involved in the collision would be voluntarily interviewed in due course.
A spokeswoman for West Midlands Police said: "Our investigation into a collision on Aldridge Road on Friday continues.
"A 51-year-old man remains in hospital and will be voluntarily interviewed in due course.
"The family of the 20-year-old man killed in the collision have requested privacy while they grieve their loss."
Anyone who saw what happened or has dash-cam footage, and has not already spoken to police, is asked to use live chat on the police website or call 101 quoting log 4525 of October 7.