The "average", vanilla roller coaster? Their top speed in descents is about 60 MPH. But some of the newer, death-wish "can-you-top-this" Roller Coasters? I wouldn't even hazard a guess!
Very Fast
Fuji-Q highland is an Amusement Park, Not a roller coaster.
The coaster accelerates to 57 miles per hour at launch.
how fast the roller coaster is going, how high the roller coaster is in the air,
you go about 75 miles per hour on the drops.
no
62mph
150 mph is how fast it goes
The first roller coaster was Switchback Railway, opened in 1884, going only 6 mph.
25 mph
It is fast and scary and and and and and uhh .....
55mph