K&K Systems’ Sign Alerts™ can be equipped with a moisture sensor that is ideal for those locations that are notorious for moist conditions that could cause traffic accidents due to the roads being slippery. With Sign Alert and the moisture sensor attachment, accidents are kept to a minimum in those areas because drivers are cautioned of road conditions. The operation is simple, the moisture sensor activates the Sign Alert LEDs when the sensor detects moisture and the system is deactivated once the moisture leaves.