There is also the likelihood of the development of 'close area' networks, where a car ahead that spots the debris (and either hits or avoids) passes down a message along the chain, so that following vehicles are alerted and all begin to slow down in unison. Development efforts have been spent on this technology for existing vehicles, with the idea of alerting a driver to a hazard before they can visibly see it. This is especially important in low-visibility fog/snow conditions where massive pileups can occur.