We suspect there’s a local road-maintenance worker who likes to make the work of filling pavement cracks an ode to the art of Keith Haring.
We think of this person as a tar artist, or a “tartist.” There’s some compelling tartistry on display.
Also, when there’s more tar than pavement, maybe it’s time to re-pave.
UPDATE: This neighborhood’s roads were repaved on or about 15 August 2013 — the art is gone! But the roads do make more sense now, monolithically speaking.
UPDATE 2, Sept. 2014: For more unintentional Ogle County art, see here.
MonkeyMoonMachine 
It doesn’t look like your tartist even followed the cracks, as the tartist did on our road. It does appear that his/her intent was…art (?).
You’re right — it’s as if the tartist got overwhelmed by the Sysiphean impossibility of filling all the cracks, and burst through convention.
Perhaps boredom became a factor. Or the tartist was a free spirit from the get-go.