Since downloading the GIMP, my ability to experiment with road sign art is very flexible. Follow the links to see some sample hack jobs.
Signmaker and similar graphics
Hack jobs on a speed limit sign
A tribute to necromancer (of r.a.d.).
Sign at the village of Albatross, MO
Sign assembly at the new bypass at Flippin, AR
A bit of fun with a guide sign
A quick duplex error joke