Nonattainment area
(6) Nonattainment area means for the specific purpose of this regulation either the Pima County carbon monoxide nonattainment area as described in 40 CFR 81.303 or the Maricopa County carbon monoxide nonattainment area as described in 40 CFR 81.303 (i.e., the MAG urban planning area). (7) Transportation control measure (TCM) means any measure in an applicable implementation plan which is intended to reduce emissions from transportation sources. (8) Transportation improvement program (TIP) means the staged multiyear program of transportation improvements including an annual (or biennial) element which is required in 23 CFR part 450. (9) Unified planning work program or UPWP means the program required by 23 CFR 450.108(c) and endorsed by the metropolitan planning organization which describes urban transportation and transportation-related planning activities anticipated in the area during the next 1- to 2-year period including the planning work to be performed with federal planning assistance and with funds available under the Urban Mass Transportation Act (49 U.S.C.) section 9 or 9A. UPWPs are also known as overallwork programs or OWPs.