The NHTSA rule is a little confusing in its roll-out.
Sept 1 2019 was the 50% phase in date, and Sept 1 2020 will mark the 100% date. July 2019 was the date for EU compliance.
Apparently there is enough variation between the EU and US regs that the manufacturers were granted the 2020 extension so they could get their designs in order. The main I'm seeing is 19 km/h (EU) vs. 30 (18.6 MPH) (US). Both apply in either direction, as long as the vehicle is being propelled by something other than an internal combustion engine.
What's interesting is the petition to allow user selectable sounds. There's also a back-and-fourth with Honda discussing "trim level" / "series" Honda. I'd guess this came about due to their EV / Hybrid / ICE models sharing badges, but I bet this will open up as a branding opportunity (for example, Tera World trim might emit a "more premium" sound compared to a base i3).
In the press, there's been discussion that ICE vehicle can be as quiet as EVs at the slow speed range where AVAS is being required to generate noise. That brings even more questions!
- In the future, will this rule be adapted to include quiet ICE cars?
- Will ICE owners begin modding their cars with these systems as it becomes a status symbol for EV owners
- Are EV owners in large numbers going to disable these systems?
- Will third party noises become popular so an EV can sound like a throaty V8 or an ice cream truck?
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