Patent ID: 8347701

Claim:
A system configured to be positioned at a site along a roadway, and to determine the concentration of one or more constituents present in a sample of exhaust emissions emitted by a vehicle traveling on the roadway from a first location on the roadway to a second location 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 collector operatively coupled to the component detection system, wherein the collector is positioned above the surface 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; 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; and wherein the collector is configured such that collection times for exhaust emissions emitted by the vehicle to be conveyed through the collector to the component detection system vary as a function of position of the one or more openings of the collector along the roadway between the first location and the second location to aggregate the exhaust emissions for detection within the component detection system.