(1)    Definitions. In this section:

      (a)    “Eligible entity” has the meaning given in 23 U.S. Code § 213 (c) (4) (B).

      (b)    “Transportation alternatives” has the meaning given in 23 U.S. Code § 101 (a).

   (2)   Program.

      (a)    The department may administer a program to award grants of assistance to any eligible entity for transportation alternatives activities consistent with federal regulations promulgated under 23 U.S. Code § 213. The grants shall be awarded from the appropriations under s. 20.395 (2) (js), (jv), and (jx).

      (b)    Any project for which a grant is awarded under par. (a) shall be commenced within 4 years from the date that the grant is awarded. For purposes of this paragraph, a planning project is commenced when a planning study is begun and an infrastructure project is commenced when construction is begun.