Gov. Ned Lamont has proposed borrowing $45 million to launch a transit-oriented development authority that still lacks an oversight board and that he and lawmakers effectively opted not to fund eight months ago. The governor and Democratic-majority legislature created the authority last June to stimulate commercial and housing development in urban downtown areas or within one-half mile of rail or bus services. On paper it has broad authority that includes issuing bonds, investing other state resources delegated by the legislature and offering tax incentives. The CMRA is patterned after the Capital Region Development Authority, which has provided loans and other investment assistance for years for projects in and around Hartford.