Saarbrücken was resumed in the 1960s, but initially as a single lane B 408th This should lead from the triangle Dernbach to Landstuhl. The section Kaisersesch-Wittlich was completed in 1965 in one lane. Due to a French ammunition warehouse at Hasborn this was initially interrupted and after clearance by the French authorities from 1 July 1968 continuously passable. After this route had been upgraded to the motorway in 1967, the second carriageway was missing for full expansion, this was completed in 1970. Numbering system In 1974, a new numbering system for the motorways was introduced, the previously planned A11 and internally designated route from Puttgarden to Leverkusen was along with the planned sequel to the Saarbrücken to the Federal Highway 1. Since the 1970s, the highway from Lübeck was extended bit by bit to the north. North of Lübeck was the motorway junction Bad Schwartau in the form of a fork, from which the previously continuous connection from Hamburg to Lübeck-Siems now branches off as A 226. In 1975, the section from Bad Schwartau to Neustadt in Holstein was completed, in 1979 they reached as far as Lensahn, 1980 then Oldenburg in Holstein-South. Also, from the 1970s, the A 1 was gradually extended towards the Eifel. As early as 1971, the short piece of the cross Cologne-West to the junction Frechen was handed over to traffic, a year later, in 1972, they reached as far as the Bliesheim Cross, where they are here as part of a motorway A 14 of the Dutch border near Goch to the French border near Lauterbourg was planned and built. Wisskirchen was reached in 1977, in 1981 Mechernich and in 1982 the current end of the autobahn at Blankenheim. South of Wittlich, the highway was opened in 1974 between the junction Salmtal and the triangle Moselle Valley, 1975, the gap between Wittlich and Salmtal closed, making it from Koblenz to Trier continuously passable. After the introduction of the new numbering system, this highway was initially designated as A 48 and was originally intended to lead from Luxembourg via Trier, Daun, Koblenz, Wetzlar and Gießen to the Hattenbacher Dreieck. Corresponding already established sections were already provided with this number. Between Daun and Trier then a double numbering A 1 / A 48 was used, since the time at Daun a highway triangle for a subsequent route to Cologne was planned and there was some already