I am very sorry this accident occurred. I hope that the man is able to recovery completely. I am, however, glad that this accident was not worse. If there had been more people on the bus, it is very likely someone would have been injured since buses usually do not have seat belts and other safety features.
Even though it is not clear who was at fault, the driver of the car should submit a claim for Michigan No Fault benefits. No Fault insurance will pay for his ambulance and for his hospital bills. It will also pay for all reasonable and necessary follow-up treatment and for other benefits such as household replacement services or attendant care if these become necessary.
The man may also be able to file a lawsuit against the bus driver or SMART if his injuries were very serious and if the SMART bus driver was negligent in causing the accident. The man or a member of his family should contact a lawyer immediately to discuss his injuries and the police report of this accident to determine if the man has a valid lawsuit which he could file.