Tangentially relevant partial off-topic, but…
My father was very active in county politics and he was a teacher for 30 years and he died suddenly and his funeral was on a day when state offices were closed, so all things combined to give him a huge funeral (i.e. the slave balcony [not being facetious, that’s what it was] of the church was filled for the first time in years and those who came late had to stay outside). The cemetery was about 15 miles from the church and a huge percentage of the mourners followed it. Add to this the fact it was a couple of days after the worst snowfall in the history of Alabama and there was still a lot of crunch snow/ice on the ground and it was a nasty procession.
So, the funeral procession stretched for easily a couple of miles. At some point an 18 wheeler got into it, occasionally whenever the highway would briefly 4 lane cutting ahead of other cars. At some point one of the accompanying sherrives pulled him over. I remember at the graveside hearing somebody asked “Did you arrest him or just gib’ 'em a ticket?” and the sheriff responding “Neither one. Just held him there by the side’the’road til all the funeral was gone by… he ain’t done nothin’ wrong by the law.” I’ve always remembered that- the escorts are a courtesy but there’s nothing illegal about cutting in and sometimes you can’t help it.
A few years later a woman had a car-accident on the street in front of our apartment (her vehicle badly damaged and she was very distraught but nobody was hurt) and since we lived closest to where her car wrecked we took her in. The cause of the accident was that an ambulance with sirens blaring was approaching a 4 way stop just as she (who had right of way) was going through the stop sign and, thinking that the ambulance wasn’t going to slow down, she swerved, was knocked out of the way by another car [that was barely hurt at all] and that sent her into a phone poll. The ambulance and the other car both kept going (hit-and-run from the other driver).
Anyway, the point is that when the cop came to make the accident report he told her (and I always remember this too) that the accident was her fault even though she swore that “If I hadn’t let him have the road he’d have hit me” and was in hysterics. He explained that “an emergency vehicle does not have the right to force anybody off the road- even if you’re going under the speed limit it can’t make you speed up… it can only request that you do so.” He also said that EMTs did have the right to disregard speed limits and other laws, but that their drivers were highly trained to never assume others were going to let them in and even though it may look like they’re not stopping for that red light they can and will if they have to since the vehicles are checked regularly and the brakes are excellent.
Obviously whenever possible I pull over or otherwise oblige an emergency vehicle, but I’ve remembered that I’m not obligated to do so a couple of times when to accomodate the emergency vehicle might have been possible but also might have seriously endangered me (e.g. when I could possibly run a red light with the ambulance behind me but to do so might get me hit). (Alabama Drivers have never one time scored on any “most observant and considerate vehicle operators” poll anywhere- if you’re ever traveling down here, for instance, always look both ways when crossing a one-way street, never assume that the fact somebody knows the left lane is for passing/right lane is for cruising, and drive aggressively when cutting in because Southern hospitality does not extend to letting other drivers in).
Worst funeral etiquette breach I ever made was unintentional but still dreadfully embarassing. I went to a co-workers funeral back when I drove the late lamented Victor Yugo, a car that was lobotomized by an accident I had in it and was never right afterwards and could look at Job and say “pfft… think you got problems? I’d skip down Main Street eating crackers if I had your problems instead of mine so quit yer bitchin’!” I blew the horn- just a 'beep" to let someone know it was okay to get in front of me. Unfortunately when I released the horn after the ‘beep’ it had separation anxiety and stuck, so I had to go through a 2 mile funeral processing going BEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEPP! and making pained expressions to try and indicate what the hell was the problem until the car stopped long enough at a red light that I was able to identify and pull the appropriate fuse out, which also controlled something else but for the life of me I can’t remember what (lights? cigarette lighter? windshield wipers? honestly don’t remember, but damn I hated that car).