Crazy Car Accident on Prospect Ave

About 11pm there was sudden sound of screeching brakes and then the loud, terrifying and unmistakable boom of cars colliding. I believe there were 3 successive booms of an impact. I rushed outside from my apartment near the intersection of Prospect and 11th Avenue and many others had come outside as well. Down Prospect Avenue at the northwest corner of Prospect Avenue and Terrace Place a Honda Accord coupe with only the driver inside was sitting sideways in the street after it had viciously slammed in to 2 parked cars. The driver seemed to be conscious. He was trying to start his car and possibly leave the scene but it was sufficiently damaged and would not start. The driver's side door would not open. I did not get very close but my impression was that he was drunk and/or had sustained a concussion or was dazed by the impact and air bag. From the damage of his car and the 2 parked cars hit (one which was pushed so far that it had dislodged what I think was a box for telephone systems) it seems he was speeding excessively and/or was drunk. The screeching brake sound was relatively brief which indicates a very late reaction or mechanical failure. I didn't stick around long enough to figure out which direction he was coming from - whether going uphill on Prospect Avenue and just going through the intersection with Terrace Place before a sharp curve or downhill on Prospect around the curve just before the traffic light at Terrace Place. There is also the less likely possibility he was going the wrong way on Terrace Place and then collided with the parked cars. My guess would be he was going east on Prospect Avenue downhill and did not adjust for the curve as you approach the traffic light at Terrace Place. Whether the driver was drunk, distracted, speeding, careless, had a medical problem or a car malfunction one thing is clear - this is a very dangerous intersection and stretch of road. The traffic light is behind a sharp curve and the traffic signal is also obscured by trees. People speed up and down this stretch of Prospect Avenue often. This accident could easily have involved pedestrians and/or other cars with occupants. This accident was late at night but there is also an elementary school nearby on 11th Avenue and children cross with no guard at Prospect Avenue and 11th. Some of my neighbors were discussing the dangerous nature of this intersection and stretch of road and how it should be addressed. A suggestion of speed bump was mentioned. This may be a good idea. I also think anything obstructing view of the traffic light should be addressed and perhaps adding another signal at a more visible spot. Is this something that would be best brought up to the community board or the NYC Department of Transportation?