part of the paver machine and the position thereof can be controlled by suitable well known hydraulic cylinders 40 which are attached to the main screed section 36 the piston rods 41 of the hydraulic cylinders 40 are connected to the extendible screed sections 38 so as to increase or decrease the width of the distribution chamber as the paving machine is operating so that varying widths on each side of the paving machine may be paved such extendible screed paver machines are also provided with electrical switching control consoles on each side of the machine to provide for separate finger tip electrical switch control of the extendable screed sections 38 the paver 20 is provided with an edge sensing means 42 in accordance with the present invention the edge sensing means 42 is shown as being mounted to the extendible screed extension 38 by a suitable bracket 44 the edge sensing means 42 continuously determines the edge line 16 of the cold mat section 10 and is arranged and constructed to provide an appropriate signal which is employed in a desired manner to assure that the second mat section of fresh paving material is arranged to be laid in accordance with such determination so that such joint edge of the second mat section is placed in a desired location with respect to the edge line 16 for example the joint edge of the second mat section of fresh paving material may be placed parallel to and with a predetermined over lap of the edge line 16 or it may be placed parallel to and contiguous with the edge line 16 of the cold mat section 10 this is accomplished by controlling steering the paver in accordance with the edge line determination to control the position of the.