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Design and Analysis of an Automated Mechanical System for the Replacement of Raised Pavement Markers

In order to improve cost efficiency and worker safety, this report presents an alternative method of raised pavement marker replacement to the traditional method of hand application while using a specialized truck. The alternative is a machine designed to automate the replacement process. This report describes the current prototype stage. The device will be carried by some vehicle and is designed to allow for marker placement while the vehicle is in motion. To accomplish this, the primary installation equipment is mounted to a linear slide. The installation equipment is stationary with the road while placing a new marker, yet the vehicle can continue moving forward. A laboratory prototype has been developed and fabricated using a conveyor belt to simulate the relative motion of the road. The prototype can place a marker while the conveyor is at any speed up to 0.9 m/s (2 mph). The next stage of development will be a vehicle-mounted unit for field testing, and most of the current prototype can be used for that purpose.