A system for advising the operator of a transportation vehicle to impending travel conditions responsive to proximity to the area affected by the travel conditions. The system has location determination capability such as a GPS system and a source of travel condition advisory messages. When a travel condition advisory message is received and the vehicle is in the affected area, an audible signal is delivered within the transportation vehicle. Apparatus of the system may be self-contained and located aboard the transportation vehicle or alternatively may comprise message transmission apparatus located externally of the transportation vehicle.