Historical clue formulations

• U-___ (German subway) — 2026-03-19
• German route — 2019-04-12
• German way — 2013-06-15
• German train track — 2012-06-17
• U-___ (Berlin railway) — 2012-01-10
• Ruhr road — 2011-07-05
• Road, in the Rheinland — 2009-03-25
• Volkswagen route — 2008-05-22
• Ruhr road — 2006-07-12
• Road to Rostock — 2001-02-01
• Where to take a Volkswagen for a spin — 1997-06-03
• Rheinland road — 1995-03-02
• Road to the Rhein — 1994-07-10