A road marker placement apparatus comprises a dispenser 20 for dispensing a road marker such as a stud 15, a carriage 16 for collecting a marker from the dispenser and carrying it, and a drive arrangement 18 for driving the carriage 16 from a collecting position. The carriage 16 can place the road marker 15 on the road 105, preferably on a portion of adhesive 106 while being driven by the drive arrangement 18. Preferably the drive arrangement comprises an elongate guide member 48 which has an endless belt (50 Fig 6) driven by a motor, the belt moves the carriage linearly in an opposite direction and speed to the movement of the vehicle thus allowing the marker to be placed in the correct position as the vehicle moves. A speed measuring arrangement in the form of a wheel (98 Fig 10) which runs along the ground may be used to detect the speed of the vehicle.
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