Dataset, Negatives samples for Traffic (Road) Signs

[user848]

I found some links for downloading dataset for training of traffic signs (positive samples/images):

http://www.cvl.isy.liu.se/research/datasets/traffic-signs-dataset/download/

http://benchmark.ini.rub.de/?section=gtsdb&subsection=dataset

But where I can download negatives samples - images without traffic signs? Is there any dataset in the internet available? I could not find it.

[BlueCheese]

Would this work? 

[user848]

No, sounds like a joke...

It should be photos from roads. And it's not easy to collect different at least 2000-3000 photos from Google image search