I hope I'm not asking too much. Other Driver hit Family Member. I want to calculate how fast OD was going. Desired results would be accurate to within 5 MPH or less. OD was in a 2003 Hyundai Elantra; googled curb weight around 2700. FM was in a 2005 Nissan Titan; googled curb weight around 5000. Impact was on passenger side rear axle of the Titan. Titan was spun approximately 180 degrees and passenger side was lifted off the ground. I'm don't have specifics on that yet, such as did the curb stop the spin and therefore cause the truck to start a rollover, or did the impact generate the lift and the spin came to a "natural" stop? Police report indicates the Hyundai scraped the road, causing damage to the street surface. I don't have more specific info than that. Dry asphalt. Almanac.com provided the following temps on the day in question: Minimum 37.4 °F Mean 41.4 °F Maximum 48.2 °F The accident occurred on a March afternoon in a northern latitude an hour prior to sunset, so temps should not have fallen too much. I'm sure more info is needed but I don't know enough to know what that is. Any help appreciated.