Can anyone tell me what requirements for needing a DOT number in PA? It seems everyone (including officers) that i talk to has a different understanding. I do not travel across state lines at all. My highest GVW combined weight is 24,500LBS wich is an Isuzu NPR HD at 14,500LBS and a dump trailer at 10,000 LBS. Does getting a DOT number require a log book, dot inspections etc?