Patent ID: 7930931

Claim:
A system, positioned at a site along a roadway, for determining the concentration of one or more constituents present in a sample of exhaust emissions emitted by a vehicle traveling on the roadway, the system comprising: a component detection system configured to determine the concentration of one or more constituents present in vehicle exhaust emissions; a gathering structure comprising a roof that is supported above the surface of the roadway by one or more supports such that the vehicle can pass under the roof while traveling along the roadway; a collector, operatively coupled to the component detection system, that is disposed on an underside of the roof of the gathering structure and oriented in a direction parallel to a direction of travel of the roadway, the collector having one or more openings for receiving the exhaust emissions of the vehicle to be analyzed by the component detection system, wherein the roof of the gathering structure pools the exhaust emissions from the vehicle to be analyzed by the component detection system near the one or more openings of the collector prior to measurement by the component detection system; and wherein the component detection system is configured to receive a sample of the exhaust emissions of the vehicle via the collector, and to determine the concentration of one or more constituents present in the sample of exhaust emissions.