Weekly photo challenge II: From lines to patterns

Our second entry for this week’s challenge. (See challenge home at: http://dailypost.wordpress.com/2013/09/20/lines-patterns/)

Hard hat works on a road construction site at Interstates 430 and 630 in Little Rock — the Big Rock interchange. The project includes multilevel flyovers. 

Glass, wood and steel barrel vault at Crystal Bridges museum, Bentonville, Ark.