Roadway maintenance striping apparatus

An apparatus for restriping a pre-existing substantially rectangular roadway mark, the roadway mark previously placed on a roadway surface along a roadway mark path, the apparatus comprising:

• a vehicle for moving along the roadway mark path having a roadway marker for dispensing roadway mark material onto the pre-existing roadway mark;
• an imager mounted on the vehicle and downwardly focused onto the roadway surface for imaging at least two longitudinally displaced and laterally directed line segments of the roadway mark;
• and
• a system responsive to the imager (i) for predicting the roadway mark path for aligning the roadway marker over the predicted roadway mark path and (ii) for determining the roadway marker restriping dispensing time from the at least two longitudinal displaced and laterally directed line segment images.

An apparatus for automatically determining the speed of a vehicle travelling along a skip line roadway mark path, the apparatus comprising:

• a signal generator for producing time deterministic trigger signals;
• an object space calibrated imager responsive to the signal generator for producing triggered images of similar feature characteristics of the skip line roadway mark;
• and
• a computer responsive to the signal generator and imager for determining the time difference between and object space location differences of similar feature characteristics of the skip line roadway mark between triggered images, and determining the speed of the vehicle from the time and object space location differences.