Abstract: A control system for positioning a marker over a pre-existing roadway surface mark. The control system has one or more imagers having a field of view for imaging an area of roadway mark surface encompassing the roadway mark and a computer having a machine learning network to process the roadway mark image and position the marker over the pre-existing roadway mark.

Abstract: Copolymers of acetamidoethylene are disclosed. These materials have randomly distributed units represented by the formula ##STR1## wherein R is one or more radicals selected from the group ##STR2## and the C.sub.1 to C.sub.6 carboxylic acid esters thereof, ##STR3## wherein R.sup.1 is hydrogen or a C.sub.1 to C.sub.6 alkyl, and R.sup.2 is a C.sub.1 to C.sub.6 alky; x and y are numbers greater than zero which total to 1.00; the ratio of x to y from about 0.05:0.95 to about 0.95:0.05; and n is an integer from about 14 to about 10,000.The copolymers are useful as epoxy resin curing agents, as components of protective or decorative coatings, and as intermediates in the formation of vinylamine group-containing copolymers having the formulae ##STR4## wherein x, y and n are as previously defined, x' plus z equals x and R.sup.3 is one or more of the radicals selected from the group ##STR5## wherein R.sup.1 and R.sup.2 are as previously defined.

Abstract: Vinylamine copolymers are disclosed. These copolymers have randomly distributed repeating units represented by the formula ##STR1## wherein Ar is optionally substituted phenyl, the substituents independently selected from C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy and halo; x and y are numbers greater than zero which total 1.0, the ratio of x to y from about 0.05:0.95 to about 0.95:0.05; and n is an integer from about 14 to about 10,000. Acid addition salts of these copolymers are also disclosed, as are vinylacetamide/aromatic hydrolysis precursors and the terpolymeric vinylamine/vinylacetamide/aromatic products of partial hydrolysis. The copolymers are useful as epoxy resin-curing agents and as components of protective or decorative coatings.

Abstract: Polymeric phenols of the formula ##STR1## WHEREIN N IS AN INTEGER FROM 3 TO 2,000, R.sub.1 is a lower alkyl and R.sub.2 is hydrogen or a lower alkyl, are disclosed. Their preparation and preferred use as antioxidants, especially nonabsorbable food antioxidants, are also disclosed.