The School Area sign may be used in advance of a school ground.

Where a school abuts a road, it is advisable to provide advance warning to the driver approaching an area where children walk along or may cross the road. In these circumstances, the driver is required to exercise caution in proceeding through these areas.

The color for the WC-1 and WC-16 warning signs has been changed to fluorescent yellow-green conforming to the requirements of ASTM E991 and ASTM E1247 for fluorescent materials and as described in the "Federal Highway Administration Federal Register/Vol.63 No.118, June 19, 1998 / Rules and Regulations".