To date, very few air quality projects have been supported under CMAQ
, so when the new transportation bill passed last year, there was a concerted effort, an agreement, from our side and the Department of Transportation that language was going to be put in the transportation funding bill to give priority to projects that retrofit transportation, construction equipment and other engines.
program was established under the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 as a funding source for transportation projects and programs that help support the goals of the 1990 Clean Air Act Amendments.
projects aim to reduce mobile source emissions through intersection and traffic signal system modifications, vehicle conversions to alternate fuels, implementation of high occupancy vehicle (HOV) lanes, new bicycle and pedestrian facilities, transit systems improvements, and in this region, commuter rail implementation between Dallas and Fort Worth.
Also among the most difficult MPO functions were the tasks of prioritizing and allocating funds in the TIP, in the CMAQ
program, and among local jurisdictions (Table 5, Cont., column 2).
The 1990-2010 gridded annual average [PM.sub.2.5] concentrations with 108 km x 108 km resolution over the northern hemisphere (see domain coverage presented in Figure 1) are obtained from simulations with a hemispheric version of the Weather Research and Forecast (WRF) model coupled with the CMAQ
model developed by the U.S.
program is intended to finance transportation-related air quality improvement and congestion management projects.
Johnson tried to secure another NLC-supported amendment that would guarantee clean air funding to local areas under the CMAQ
program, but she was unsuccessful.
"This project is one of the first in the country to be done with CMAQ
We used CMAQ
version 4.7.1 (Byun and Ching 1999; Byun and Schere 2006) instrumented with DDM-3D (Dunker 1984; Napelenok et al.