Patent ID: 8266952

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; a collector operatively coupled to the component detection system, wherein the collector is positioned above the surface of the roadway and oriented in a direction parallel to a direction of travel of the roadway, and has one or more openings for receiving the exhaust emissions of the vehicle to be analyzed by the component detection system; a gathering structure having one or more surfaces positioned to direct the exhaust emissions of the vehicle to be analyzed by the component detection system to 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.