According to the Texas Transportation Code, Section 550.026, motorists are required to immediately call 911 to report an accident if it resulted in a person's injury or death. Similarly, authorities must be notified if the accident resulted in severe damage to a vehicle to the extent that it can no longer be driven safely. Also, if the vehicular damage can be reasonably assumed to exceed $1,000, the authorities must be notified. Officers may make a preliminary determination about who was at fault for the accident. It's always essential to file a police report even if the law does not strictly require you to do so-- it can show that the other driver may have been at fault.