None of our local agencies even have 2-wheel officers any more. We used to have several city cops and a large number of sheriff's deputies. Occasional speed enforcement duty (my second ever traffic ticket was from a cop on a bike, interrupted his sandwich), but mostly escort, as in funerals. AFAIK, not a single bike LEO exists in the county today, mostly due to a large number of accidents in funeral escorts. It would take several units to escort a funeral, and they would put the bike in the intersection, dismount to stand at parade rest as the procession passed, then mount and pass the procession to their next intersection, leapfrogging other officers on the way. That passing to get ahead was always the scary part. Sometimes some idiot on the other side of the street from the cop would zoom as soon as the last car passed, not realizing the LEO was there.
So yes, escort is hazardous. The presidential motorcade doesn't hang around. When Bush was here during the 2000 campaign I stood at the roadside and they passed at about 40 MPH, on a 2-lane downtown business street, and I think they'd slowed because the intersection ahead was rough (bad road crowns, and they still bottomed out every vehicle!)
As far as crashing afterwards, I couldn't say anything to that.