If you've driven through the on-ramps to Interstate 280 and Interstate Highway 380 over the last few weeks, you may have noticed some signs that look out of place.

Not the freeways signs, of course. If you've ever glanced off to the side, you'll see a Ron Paul for President sign. Two to be exact—one at I-280 and the other at I-380.

No one knows who put up the signs. Matthew Heath, the Northern California state coordinator for Paul's campaign, said he didn't know anyone who had put up any new signs in all of California after the June primary, when Mitt Romney won the Republican presidential nomination with ease.

Rep. Ron Paul, R-Texas, a three-time presidential candidate, came in a distant second place with 9 percent of the vote. However, the Ron Paul signs in San Bruno have yet to come down—or no one has bothered to take them down—even though the Texas congressman has essentially ended his campaign for president.

It's almost as if the signs are still standing in defiance of the popular vote just like Paul's views often stand in opposition to popular beliefs and even those of his fellow Republicans.

"It just shows the level of support," Heath said in pondering a reason for why the signs are still up.