RICHMOND — Virginia’s failure to adequately fund its transportation network stands as Gov. Tim Kaine’s biggest regret as he prepares to leave office, he said Wednesday.

Kaine, with less than a month left in his term, looks back with frustration on four years of logjam, false starts and partisan rancor in the General Assembly that deferred what was a top campaign promise in his 2005 bid for governor. And he said he feared only a disaster would be enough to prompt action in the General Assembly.