Background:
I don't beleive races should be red-flagged in wet conditions if the water level is apparently below the typical wet ride height of the cars ( difference in radius of wet and dry tyres). Racing is dangerous. The cars CAN drive in these conditions. Drivers must adjust their speeds accordingly in wet conditions so that the race goes on. This is what the fans want to see.
Invention:
I propose to place at notorious corners in wet conditions, a large indicator, showing the wetness rated 0 to 100, to be used to warn drivers so that they may adjust their corner speeds accordingly.
How will this work?
There will be capacitive sensors embedded throughout the corner. The capacitance changes with the water film thickness above the asphalt. The level of water and thus capacitance that causes aquaplaning at race speeds, will be assigned 100% wet. The capacitance of the dry track (air) will be set at 0%.
The panels will be set in view going into the corner and upon viewing the panels the drivers will use their best judgement to adjust their speeds going into the corner.