This episode's headline: Road Block; Speaking Out; Taps. The guests include SEN. DANIEL PATRICK MOYNIHAN, [D] New York; SEN. DAVE DURENBERGER, [R] Minnesota; SEN. CHRISTOPHER BOND, [R] Missouri; LOUIS GAMBACCINI, Public Transit Official; LANA BATTS, American Trucking Association; CORRESPONDENT: ROGER MUDD. Byline: In Washington: JAMES LEHRER; In New York: JUDY WOODRUFF