As used in this Division:
     “Units of local government” mean counties with a population over 400,000 and all home rule municipalities.
     “Road improvement impact fee” means any charge or fee levied or imposed by a unit of local government as a condition to the issuance of a building permit or a certificate of occupancy in connection with a new development, when any portion of the revenues collected is intended to be used to fund any portion of the costs of road improvements.
     “Road improvements” mean the improvement, expansion, enlargement or construction of roads, streets, or highways under the jurisdiction of units of local government, including but not limited to bridges, rights-of-way, and traffic control improvements owned and operated by such units of local government. Road improvements may also include the improvement, expansion, enlargement or construction of roads, ramps, streets or highways under the jurisdiction of the State of Illinois, provided an agreement providing for the construction and financing of such road improvements has been reached between the State and the unit of local government and incorporated into the comprehensive road improvement plan. Road improvements shall not include tollways but may include tollway ramps.
     “New development” means any residential, commercial, industrial or other project which is being newly constructed, reconstructed, redeveloped, structurally altered, relocated, or enlarged, and which generates additional traffic within the service area or areas of the unit of local government. “New development” shall not include any new development for which site specific development approval has been given by a unit of local government within 18 months before the first date of publication by the unit of local government of a notice of public hearing to consider the land use assumptions relating to the development of a comprehensive road improvement plan and imposition of impact fees; provided, however, that a building permit for such new development is issued within 18 months after the date of publication of such notice.
     “Roads, streets or highways” mean any roads, streets or highways which have been designated by the unit of local government in the comprehensive road improvement plan together with all necessary appurtenances, including but not limited to bridges, rights-of-way, tollway ramps, and traffic control improvements.
     “Comprehensive road improvement plan” means a plan prepared by the unit of local government in consultation with the Advisory Committee.
     “Advisory Committee” means the group of members selected from the public and private sectors to advise in the development and implementation of the comprehensive road improvement plan, and the periodic update of the plan.
     “Person” means any individual, firm, partnership, association, public or private corporation, organization or business, charitable trust, or unit of local government.
     “Land use assumptions” means a description of the service area or areas and the roads, streets or highways incorporated therein, including projections relating to changes in land uses, densities and population growth rates which affect the level of traffic within the service area or areas over a 20 year period of time.
     “Service area” means one or more land areas within the boundaries of the unit of local government which has been designated by the unit of local government in the comprehensive road improvement plan.
     “Residential development” means a house, building, or other structure that is suitable or capable of being used for residential purposes.
     “Nonresidential development” means a building or other structure that is suitable or capable of being used for all purposes other than residential purposes.
     “Specifically and uniquely attributable” means that a new development creates the need, or an identifiable portion of the need, for additional capacity to be provided by a road improvement. Each new development paying impact fees used to fund a road improvement must receive a direct and material benefit from the road improvement constructed with the impact fees paid. The need for road improvements funded by impact fees shall be based upon generally accepted traffic engineering practices as assignable to the new development paying the fees.
     “Proportionate share” means the cost of road improvements that are specifically and uniquely attributable to a new development after the consideration of the following factors: the amount of additional traffic generated by the new development, any appropriate credit or offset for contribution of money, dedication of land, construction of road improvements or traffic reduction techniques, payments reasonably anticipated to be made by or as a result of a new development in the form of user fees, debt service payments, or taxes which are dedicated for road improvements and all other available sources of funding road improvements.
     “Level of service” means one of the categories of road service as defined by the Institute of Transportation Engineers which shall be selected by a unit of local government imposing the impact fee as the adopted level of service to serve existing development not subject to the fee and new development, provided that the level of service selected for new development shall not exceed the level of service adopted for existing development.
     “Site specific development approval” means an approval of a plan submitted by a developer to a unit of local government describing with reasonable certainty the type and intensity of use for a specific parcel or parcels of property. The plan may be in the form of, but need not be limited to, any of the following: a preliminary or final planned unit development plan, subdivision plat, development plan, conditional or special use permit, or any other form of development use approval, as utilized by a unit of local government, provided that the development use approval constitutes a final exercise of discretion by the unit of local government.
     “Developer” means any person who undertakes new development.
     “Existing deficiencies” mean existing roads, streets, or highways operating at a level of service below the adopted level of service selected by the unit of local government, as defined in the comprehensive road improvement plan.
     “Assisted financing” means the financing of residential development by the Illinois Housing Development Authority, including loans to developers for multi-unit residential development and loans to purchasers of single family residences, including condominiums and townhomes.