In New York ,our DOT got the bright idea to sell all of the dirt,rock,etc earth product haulers a special (R) permit.
Which meant those companies dealing with those materials could haul unlimited weight,whatever their equipment could safely handel.
So those companies jumped at the offer,however the DOT had second thoughts after issuing the permits, that most bridges would not hold unlimited weight.
So they turned to posting our bridges with signage that read 'No R Permits.
The company's that had bought the permits never paid to renew them because of the bridge restrictions.
So I have seen the (R) permit signage disappearing these last few years.
As I'm not sure if there is anymore (R) permits being issued anymore?