interior gauges fail above 30mph

When stopped at traffic light, the rpm, odometer, etc will read normal including clock. When I start and go above 30mph the gauges all peg to zero. The odometer mileage does not register. The only working gauge is the clock. So what do I do?

Update from Apr 25, 2015: Yesterday, the car would not start, the windows would not go up, and accelerator pedal was very slugish. At the end of the day, I pressed the remote unlock button, the car started and I drove home with fingers crossed. And again, the gauges were still pegging to zero above 30mph.