Satnav for trucks?

Does anybody know of any sat nav systems specially designed for trucks, i.e. with bridge heights/weight limits etc. Would be good to know as Im thinking of coming off trunking and into general haulage!

I don’t think that there is one - there is a POI file with bridge heights for TomTom, but that is about it - it hasn’t got me into trouble as long as I review the route before I set off… …