Lösterbachtalbrücke, Road bridge in Rhineland-Palatinate, Germany.

The Lösterbachtalbrücke is a 644-metre girder bridge on the A1 motorway, built in 1973/74, spanning the Löster valley between Nonnweiler in Saarland and Gusenburg in Rhineland-Palatinate. Its midpoint marks the state border, and its tallest pier rises 100 metres above the valley floor, the highest bridge on the A1. It also crosses the disused Hochwaldbahn Trier–Türkismühle line at kilometre 55.

The Lösterbachtalbrücke was built in 1973/74 as a girder bridge carrying the A 1 motorway across the Löster valley. Its midpoint marks the state border between Saarland and Rhineland-Palatinate. At 644 m long and up to 100 m high, it is the highest bridge on the A 1. It also spans the disused Hochwaldbahn line Trier–Türkismühle at kilometre 55.

The bridge marks the state border between Saarland and Rhineland-Palatinate at its midpoint. Below it, the disused Hochwaldbahn line from Trier to Türkismühle passes at kilometre 55, and two railway bridges of the same line near Hermeskeil and at the border also carry the name Lösterbachtalbrücke.

The bridge carries the A 1 motorway; its midpoint marks the border between Saarland and Rhineland-Palatinate, so a crossing passes from Nonnweiler into Gusenburg. Below it, at kilometre 55, the disused Hochwaldbahn Trier–Türkismühle line runs along the Löster. The structure is a road bridge, not a walking route.

The midpoint of the bridge marks the state border between Saarland and Rhineland-Palatinate, so a single crossing passes from one federal state into the other. Beneath it, at kilometre 55, the disused Hochwaldbahn line from Trier to Türkismühle runs along the Löster. Two other railway bridges of that line, near Hermeskeil at kilometre 51.7 and at the border at kilometre 53.967, also carry the name Lösterbachtalbrücke.