German Car Zone

Close observers of the Formula One’s recent winter testing at Barcelona may have noticed the conspicuous absence of marshals waving caution flags when something goes awry. That’s because F1 is trying out its latest innovation in the name of driver safety, the electronic flag.
Placed prominently in the braking zone, these large displays are able to change to all the applicable F1 colors, and are said to be much easier to see than a marshal waving from the sidelines. The FIA has considered the electronic items for a while, liking the notion of the race director being able to have control over deploying the flags from a central location.
What’s more, with these electric warning signs hooked up to a standard control unit, teams will be able to easily integrate software into their cars that will allow the current flag to be displayed on a driver’s steering wheel. Fancy.
http://news.windingroad.com/motorsports/formula-one-debuts-electronic-warning-flags-at-barcelona/