In general, there are two types of markers (reflectors). Both are extremely valuable to delineate travel lanes and to help enhance pavement markings. These markers provide highly effective, long-life visibility, particularly at night and in wet weather. The prisms on the markers reflect after a person's headlights shine on them.

Temporary Markers
These markers are traditionally done in work zones. They are typically spaced from 5' to 80' apart. They are easily installed, either with a 2-part epoxy or bitumen. When the work zone needs to be altered, the markers are removed with very little damage to the existing surface.

Permanent Markers
There are two types of permanent markers, snow-plowable raised pavement markers, and recessed reflective pavement markers. IRM uses a very versatile piece of equipment, a "Road Pro" machine, to install these markers. Not only can it cut the appropriate slots for markers, but also when used with the correct cutting heads, it can also be used as a deck and groove planer, a grinder for line removal or a rumble strip grinder.

Snow-plowable Raised Pavement Markers
These markers have the prisms set in a metal casting, which are installed in a cut made by a drop saw, normally with 20" radius blades surrounding a gang of 18" radius blades. The casting is installed using a 2-part epoxy, and is designed to protect the prisms from vehicular traffic and snowplow damage to insure reflectivity for years. Unfortunately, prisms can be destroyed, but can be replaced fairly easily in the existing casting.

Recessed Reflective Pavement Markers
These markers are installed in "grooves" in the road made by a specially designed cutting head. The grooves are approximately 4' long for one-way markers and 7' long for two-way markers. The marker is installed with a 2-part epoxy and sits at the low point of the groove, about 5/8" below the road surface. These markers are highly reflective and can be useful for many years. If these markers do become defective, they can be easily replaced in the existing cut in the road.