This is about making a system, able to measure the state of the road like water, snow, ice and locate it precisely. These information would be transmitted, for example using bluetooth to the driver cell phone, then publish on a central website. This website will then share the data to alarming systems and GPS system to send alerts before you reach a dangerous zone. The GPS will also be able to propose you a safer road than the direct one.
As all the idea in this category, feel free to comment, and develop, if you become rich with it … don’t forget to help me paying my house !