Partly suggested in other posts, I want to suggest is explicit. This route connects the biggest city of Sønderjylland in Denmark to Niebüll, short over the border. The length is 98 km (60,9 miles). It has the next stations: - Esbjerg - Esjberg Jerne* - Tjæreborg - Bramming - Sejstrup* - Gredstedbro - Ribe Nørremark - Ribe - Hviding* - Rejsby* - Brøns* - Skærbæk - Døstrup (Sønderjylland)* - Bredebro - Visby* - Tønder Nord - Tønder Border Denmark - Germany - Süderlügum* - Uphusum - Niebüll Stations with a * are request stops. It drives as 030 from Esbjerg to Tønder and changes line number to RB66 from Tønder to Niebüll The line is only operated by a regional train. Although between Niebüll and Tønder the Norddeutsche Eisenbahn Gesellschaft is the operator, in practice the whole route is run by Arriva Danmark GoCollective with Lint 41 trains. It has an hourly service for the whole route and a half-an-hour service between Esbjerg and Ribe. Between Esbjerg and Bramming the line is double track with overhead wires and allows 180 km/h (111,8 mph). Between Bramming and the border with Germany, the line is a single unelectrified track and allows 100 km/h (62 mph). The whole line was equipped with Automatic Train Control ZUB 123, but the line is in conversion to run on ECTS 2. Between Tønder and Niebüll the line is a single unelectrified track that allows 80 km/h (50 mph) track and is equipped with PZB. From Esbjerg the 030 turns and drives to Varde and Skjern. In Bramming the main line continues to Kolding. In Niebüll you can change to the trains to Hamburg, Westerland(Sylt) and Dagebüll. The train gives an alternative to the long-distance trains via Flensburg. The line can look uninteresting but has some variety that won't bore you as a driver or passenger. But don't forget your passport or ID card if you cross the border to Denmark.
Fun fact, Niebüll track 4 and the stretch from Niebüll to the border is even equipped with both PZB and ATC. However there are so few cabride videos of it on YouTube, and none that I've seen cover the bit from Niebüll to Tønder.
