he staff to the Boston Region Metropolitan Planning Organization, the Central Transportation Planning Staff (CTPS), was created in 1974 to develop a permanent resource of expertise in comprehensive, multimodal transportation planning and analysis. CTPS promotes interagency cooperation, ensures consistency among planning efforts, reduces redundancy, and fills gaps in the capabilities of MPO members—thus enabling the MPO's 3C (and related) work for member agencies to be accomplished efficiently and effectively.