TheEngineer wrote:Loud sudden noises are not a welcome thing on the track.
Yeah, if I suddenly heard a loud horn from an approaching vehicle (and in my case, all other vehicles on track are approaching vehicles...), my first thought would be "Oh, crap, is that the tow truck/ambulance/fire truck?" and not "Oh, that must be a fellow racer informing me of an incipient pass," which means it would indeed fall under the "or similar" part of 3.J.10.
Also, if the plan is to honk the horn regularly for passes, please stop and ask whether this idea passes the "What if everyone else did this, too?" test. It does not.
Finally, if the "loud horn" truly is loud, I imagine the 92dB limit of 3.I.5 would be interpreted to refer to more than just the exhaust.
Overall, my guess is this would quickly lead to being flagged and told to knock it off.
1982 MG Metro 1300: IOE 2015 Pacific Northworst GP, Longest Distance 2010 Cd'L Box Wine Country Classic
1980 KV Mini 1: Worst of Show and Fright Pig Supremo 2009 Concours d'Lemons
1978 H Special: Second-Round Elimination 2010 Lemons Pinewood Derby at Sears Pointless
1967 SAAB 96: IOE 2012 Pacific Northworst GP, Organizer's Choice 2022 Hell on Wheels California Rally