The agencies differed somewhat on their preferences for different type of equipment. The ones using the self-propelled Crack Sealing Machine units are pleased with their operation. It allows them to reduce their crew size by person. Additionally, they believe the Self-propelled Crack Sealing Machine units are much safer for their employees to operate because of the remote cab controls.
Different agencies are also choosing the trailer type Crack Sealing Machine units are extremely satisfied with their operation. The trailer units are versatile and can be utilized for a variety of highway repairs. Since the operator is on the ground close to the distressed pavement area, a more exact repair can be made. The down side of this is the increase in crew size since a truck driver is needed in addition to the patcher operator. Furthermore, even with proper work zone traffic control, the operator is exposed to errant traffic.
Another disadvantage is the potential for coating the operator and parked vehicles with over spray. Several of the agencies indicated the way to minimize an over spray condition is to use equipment where the hose and nozzle can be placed close to the pavement. The closer the nozzle gets to the pavement, the less chance of over spray.
