Roadway pavement warning is a job description for a SLO, which stands for a Street Lighting Officer. This position is responsible for ensuring that all roadway pavement warning signs are in place and functioning properly. They also inspect the pavement for any potential hazards and make sure that the warning signs are visible and legible. The SLO is also responsible for maintaining the roadway pavement warning system and making sure that it is up to date with the latest safety regulations.