An apparatus for cutting grooves in a ground surface includes a wheeled vehicle with a tool carrier connected to the wheeled vehicle. The tool carrier is rotatable about an axis parallel to the direction of travel of the vehicle and perpendicular to the direction of travel of the vehicle. A grinding tool for cutting grooves in a ground surface is rotatably mounted to the tool carrier. The grinding tool may be movable laterally relative to the vehicle. A rotatable cam is configured so that rotation of the cam causes pivotal movement of the tool carrier relative to the forward frame. Rotation of the cam moves the grinding tool into and out of engagement with the ground surface.

A system for monitoring the wear of a solid plate having a surface exposed to abrasive wear and comprising: a through boring in the solid plate having a boring longitudinal axis (LA), a substantially cylindrical part, and an end part adjacent said surface, the end part having an end part surface being at least partly conical in cross-section along the boring LA, and a counter-sunk head screw having a screw LA, a shaft fitting into the cylindrical part, and a head with an underside at least partly conical in cross-section along the screw LA, a first angle between the underside and the screw LA bigger than a second angle between the end part surface and the boring LA, and a sensor at a fixed position on a side of the solid plate opposite said surface and adapted to measure a change in distance between a screw tip and the sensor.

A system for monitoring the wear of a solid plate having a surface exposed to abrasive wear and comprising: a through boring in the solid plate having a boring longitudinal axis (LA), a substantially cylindrical part, and an end part adjacent said surface, the end part having an end part surface being at least partly conical in cross-section along the boring LA, and a counter-sunk head screw having a screw LA, a shaft fitting into the cylindrical part, and a head with an underside at least partly conical in cross-section along the screw LA, a first angle between the underside and the screw LA bigger than a second angle between the end part surface and the boring LA, and a sensor at a fixed position on a side of the solid plate opposite said surface and adapted to measure a change in distance between a screw tip and the sensor.

An autonomous earth moving system can determine a desired state for a portion of the EMV including at least one control surface. Then the EMV selects a set of control signals for moving the portion of the EMV from the current state to the desired state using a machine learning model trained to generate control signals for moving the portion of the EMV to the desired state based on the current state. After the EMV executes the selected set of control signals, the system measures an updated state of the portion of the EMV. In some cases, this updated state of the EMV is used to iteratively update the machine learning model using an online learning process.

Every time the haulage vehicle position data and the road surface condition data are received from a haulage vehicle 120, the segment including a position specified by the haulage vehicle position data, a reception time, and the road surface condition data are associated with one another for accumulation. Every time the repair vehicle position data and the work status data indicating a working state are received from a repair vehicle 130, the road surface condition data associated with the segment including a position specified by the accumulated repair vehicle position data is reset. Every time the road surface condition data is newly accumulated, a prediction function is determined to predict a chronological change in road surface conditions of the segment based on the road surface condition data accumulated on a segment-by-segment basis and a repair scheduled time-of-day is calculated according to the prediction function to output to an output apparatus.

Every time the haulage vehicle position data and the road surface condition data are received from a haulage vehicle 120, the segment including a position specified by the haulage vehicle position data, a reception time, and the road surface condition data are associated with one another for accumulation. Every time the repair vehicle position data and the work status data indicating a working state are received from a repair vehicle 130, the road surface condition data associated with the segment including a position specified by the accumulated repair vehicle position data is reset. Every time the road surface condition data is newly accumulated, a prediction function is determined to predict a chronological change in road surface conditions of the segment based on the road surface condition data accumulated on a segment-by-segment basis and a repair scheduled time-of-day is calculated according to the prediction function to output to an output apparatus.

Portable asphalt reclaimer having a pivotable lid with an integral heating element, and an asphalt holding chamber containing a grate. Asphalt may be reclaimed by placing asphalt chunks on the grate, heating them from above using the heating element in the lid until asphalt falls through the holes in the grate. The asphalt may be removed through a lower door. The pivotable lid may be detachable to separately heat the ground surface to which asphalt is to be applied.

A method of mounting at least one spray gun assembly onto an arm of a line striper includes installing a first clamp onto the arm with the first clamp being connected to a first spray gun assembly and the first clamp having an opening. The first clamp is installed onto the arm by placing the arm within the opening of the first clamp without sliding the first clamp onto an end of the arm. The method also includes securing the arm of the line striper within the opening of the first clamp.

A self-propelled road milling machine includes a plurality of height sensors and a controller configured to determine a cross slope of the roadway being milled. Wherein in a first leveling mode at least two sensors are longitudinally aligned and laterally spaced on one side of the milling machine, closet to the center of the road. The controller using sensor signals to adjust the cross slope of the milling drum to be parallel to the cross slope of the roadway adjacent the milling machine. Wherein in a second leveling mode the sensors are on opposite sides of the milling drum.

The self-propelled construction machine, in particular road-milling machine, recycler, stabiliser or surface miner, comprises a machine frame 2, which is supported by a chassis 1, which has wheels or tracks 1A, 1B. A milling drum 4 is arranged on the machine frame. The wheels or tracks 1A, 1B and the milling drum 4 are driven by a drive unit 8. Furthermore, the construction machine comprises a control unit 19 for controlling the drive unit 8 and a signal-receiving unit 18 for detecting at least one measurement variable M(t) which is characteristic of an operating state of the milling drum 4. The construction machine is characterised in that the rotational speed of the milling drum 4 is adapted, on the basis of at least one measurement variable M(t) which is characteristic of a critical operating state of the milling drum, to the operating conditions of the construction machine in such a way that the milling drum is operated in a non-critical operating state. The adaptive open-loop control of the milling drum rotational speed allows the construction machine to be operated at an optimum operating point with respect to the milling drum rotational speed.