There's one in Arlington where I-20 & 820 intersect on Wed. nights
It plays out more like a game of Mario Kart since there's no 90deg. turns
Competition is noticeably less stiff and/or vertically compliant than Plano.
EDIT: txbra.org doesn't recognize it but here's the website:
http://www.teambicyclesinc.org/Wednightcrit.htm