nuvi 450T screens

Main Screen - note lane assistance,
phone control
truck hazard head warning
current speed limit,
Traffic icon

Main Screen - note truck height warning,
current road name
phone control
current speed limit,
Traffic icon

Main Screen with severe truck related warning RED

Truck profile setup screen
(metric units available as well)

Main Screen with cautionary truck related warning Yellow

Main Screen with severe truck related warning RED
(distance to go and height restriction displayed)