One test for the road, David Conlan tests his blood alcohol level before deciding whether to drive

Original Toronto Star caption: One test for the road; David Conlan tests his blood alcohol level before deciding whether to drive. Machines like this one; located in a Yorkville parking garage; are being looked at seriously by the city for use on Toronto sidewalks next year. The breathalyzers work this way: You blow through the little straw into the machine; activating a green (pass); yellow (warning) or red (fail) light.