Here's a link to a survey being done by the Washington State DNR on trail use by Ebikes. The link is to a hiking site where you will find the survey link because I couldn't get the survey directly linked due to having taken the survey. Guess they are still taking input on what to do about trails and ebikes. Hope I haven't confused you.
https://www.wta.org/news/signpost/share-your-thoughts-on-e-bikes-on-trails
https://www.wta.org/news/signpost/share-your-thoughts-on-e-bikes-on-trails