Most RV owners rely on their GPS or smartphone apps for navigation, but standard navigation apps don’t account for bridge clearances, construction zones, or temporary height restrictions. Even RV-specific GPS units sometimes have outdated bridge height data, which can leave you stuck at a low overpass with no good way to turn around a 30-foot rig.
The real issue is that bridge heights change more often than you’d expect. Construction projects can temporarily reduce clearance with equipment or protective barriers. Road resurfacing can lower the effective height by several inches. Weather-related damage might add temporary restrictions that won’t show up in any navigation system for weeks or months. A bridge marked as 13’6″ clearance might actually be 12’8″ due to ongoing roadwork, and that difference matters if you’re in a tall Class A or have rooftop equipment.
Experienced RVers use a two-step approach: start with RV-specific routing, then cross-check problem areas using state DOT websites or apps like 511 systems that show real-time construction and restrictions. Many states maintain bridge databases you can search by route. It takes an extra 10 minutes of planning, but it prevents the nightmare scenario of being stuck under a bridge with traffic backing up behind you.
The backup plan is just as important as the primary route. Always identify at least one alternate path to your destination that avoids the same potential problem areas. If your main route takes you through a major city with multiple low bridges, your backup shouldn’t go through the same downtown area.