TPI 360° road monitoring prism consist of a metal cast holder for superior durability and reliability. It features three 10 mm mini prisms for 360° measurements capability. The holder is 4" diameter and 0.7" height off pavement. The road prism can be cemented on a flat surface with any AASHTO rated adhesive such as hot hot melt tar, epoxy, etc. It can also be bolted in place.
360° measuring
-13 mm offset
Tough metal construction
Reusable design
High quality glass optical prism
Easy to install, cementing or bolting
Field installable
Non distracting to drivers
Used with AMTS systems to monitor displacement of inaccessible locations, such as active roads