The present invention is a sinking seat for a vehicle assembled with a rear leg and a grooved leg integrally coupled to enable convenient handling due to the unification of parts. The package is created by placing an order including the selection of frequency band of operation and either stand-alone mode infrastructure, to be used when all existing infrastructure is inoperable, or expanded infrastructure mode, to be used to extend coverage across remote region having gaps in coverage. A hinge mechanism is disclosed which facilitates the provision of a smooth roadway surface as well as a tight seal. The screed machine is manually moved along the stone base by an operator pulling on the handle pivotally connected to the frame. The viewing position may include any number positions for viewing an object in a field of view.