kidney function elevated. My doctor called and said that my kidney function was elevated just a little.
Caution.. It means that traffic approaching the yellow light has the Right-of-Way to proceed through the intersection, but a significant volume of traffic is, or may be, approaching from the cross street(s). The driver is thus warned to be wary of vehicles that may be entering or crossing the roadway.
The purpose of the school bus sign and hazard warning lights is to make other road users aware that when the vehicle is stationary children are likely to be getting on or off the bus and may be crossing the road. Other road users should, therefore, be very cautious when passing a school bus in those circumstances.