Sen. Frank Lautenberg (D-N.J.), a longtime advocate of transportation safety and infrastructure, will not seek reelection in 2014, he announced Thursday.

Sen. Jay Rockefeller (D-W.Va.), chairman of the powerful Commerce, Science and Transportation Committee, announced Friday that he will not seek reelection in 2014 after serving five terms in the U.S. Senate.

Two transport issues left over from the last Congress are moving in different directions on Capitol Hill in the early days of the current congressional session.