24/7 Support for CDL Drivers, Owner-Operators & Fleet Safety Directors (`cdlnav.com` • `highwayatlas.com`)
Email: support@cdlnav.com
Response SLA: Under 12 business hours.
Q: How does the Tandem Hole-Slide Calculator work?
Standard 53-foot dry vans and reefers transfer approximately 250 lbs per 4-inch locking hole (or ~375 lbs per 6-inch hole). Moving the trailer tandem assembly toward the rear of the trailer shifts weight off the trailer tandems and onto the tractor drive axles.
Q: How does the 400–550 lb APU Exemption work?
Under 23 U.S.C. § 127(a)(12), heavy-duty commercial vehicles equipped with a qualified Auxiliary Power Unit (APU) or idle-reduction technology are permitted an additional 400 to 550 lbs depending on state adoption, provided the driver carries manufacturer weight certification in the cab.
Q: How do I restore my Pro subscription or delete my account?
Open CDL Nav, tap ★ Pro in the top header or bottom bar, and select either Restore Apple Purchases or Delete Account (5.1.1v).