Smart Sign Web Camera

Sponsored By

Carbon Monoxide Emission Thresholds
%CO < 1.0%
1.0%>= %CO < 3.5%

%CO >= 3.5%
          or       
%HC >= 2500 ppm

On Average 93% of the vehicles receive
a Good reading!

5% of the vehicles receive a Fair reading!
2% receive a Poor!

A note about the picture! The camera mounting point makes it difficult to have the sign and the vehicle in the same field of view. We have added a small prism to the camera lens to enlarge the field of view of the vehicles. The trade-off is the discontinuous edge between the roadway and the sign.

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This site was last updated March 19, 2007