Historical clue formulations

• See 114-Across — 2023-05-14
• Comes out — 2018-09-06
• Goes from two lanes to one — 2015-09-08
• Where many accidents occur — 2014-05-10
• Becomes one — 2010-03-17
• Comes together — 2010-03-07
• Tricky highway maneuvers — 2009-09-03
• Welds — 2008-01-06
• Gets into a single lane, say — 2007-08-10
• Confederates — 2003-03-14
• Consolidates — 2002-10-03
• Makes one — 1995-02-12
• Combines — 1995-01-09
• Enters a freeway — 1994-01-31