Historical clue formulations

• Like Bugles snacks — 2019-04-12
• Like a top — 2013-11-02
• Kind of section — 2007-03-09
• Shaped like a dunce cap — 2006-07-31
• Like highway traffic markers — 2003-12-23
• Dunce cap-shaped — 2002-12-10
• Like dunce caps — 2001-10-17
• Like orange traffic markers — 1999-09-27
• Like some traffic barriers — 1996-12-15
• _____ projection (map system) — 1994-07-26