Cat's Eye -> Raised Reflective Pavement Marker
A Raised Reflective Pavement Marker (RRPM) is a safety device used on roads. They are usually made of plastic or ceramic, and come in a variety of shapes and colors. They include a lens or sheeting that enhance their visibility by reflecting vehicle headlights.
RRPMs, especially the earlier varieties are often known as Cat's Eyes.
RRPMs come in multiple colours which vary in usage depending on local traffic marking standards. Some road authorities, including the Department of Transport and Main Roads (Queensland) use RRPM colouration as follows:
- White markers — for lane markings. When used on dual-carriageways, motorways or one-way roads they may illuminate red on the reverse, to indicate drivers are travelling the wrong way.
- Yellow markers — these are used to mark opposing directions of travel on undivided roads as well as medians on motorways and dual carriageways
- Red markers — these are found by the hard shoulder on motorways and at the edge of the running surface on other roads. They are also occasionally used to indicate a no-entry road.
- Green markers — these are used where off ramps leave and join the main carriageway on dual carriageways.
- Blue Markers — usually used to mark the location of fire hydrants. They are also used in a 3 – 2 – 1 pattern to indicate heavy vehicle stopping locations.