On Sacramento light rail, it appears that the gates along prw and R Street in town (developed residential areas) have bells that ring for about a minute after the gates go down, then stop. The gates stay down and the lights flash. The light rail trains themselves use bells liberally at grade crossings. Once out of town though (I think at 65th St., definitely beyond) the bells continue as long as the gates are down. Perhaps (beyond 65th) the fact that there's a freight line parallel in the r/w makes a difference? It's all "quiet zone" except one crossing that's a state highway - light rail trains still blow the horn for that one. But that's a barely-used freight lead; on the Blue Line where it shares with the former WP main line the bells also turn off after the gates are down - quiet zone.

Craziest accident I saw (and I saw or had to wait through several as a regular commute rider for over 10 years) was where the gates were down, lights flashing, 2-3 cars stopped on each side, train slowing down to enter a station; some bicycle rider, probably (from what I've seen in the area) totally plugged in and zoned out, pulled out on the wrong side of the road, passed all the cars, and hit the side of the train as it went through the crossing. Injured though not fatal, but it tied up the line in the early part of the commute for almost an hour while we sat there for the investigation. At least the location wasn't far from a hospital so it was a short ambulance ride; really, somebody could have run over with a gurney even quicker.