ICEDUP
| Date | Clue |
|---|---|
| 2020-08-15 | Like some winter windshields |
| 2019-07-27 | Became impassable, in a way |
| 2014-06-21 | Slick, in a way |
| 2012-03-12 | Became a winter hazard, as a road |
| 2009-09-05 | Needed a coating of heated propylene glycol, say |
| 2002-11-29 | Jammed, in a way |
| 1996-07-25 | Frosted |