DoI 'hiding full cost' of prom works, says committee Report claims delay to horse tram tracks also undermines Tynwald The Department of Infrastructure is being accused of hiding the true budget of the works on Douglas promenade and undermining Tynwald. A committee looking into the scheme says it's reached an impasse in its scrutiny of the project. The Environment and Infrastructure Policy Review Committee has submitted its final report on the promenade works to Tynwald. It says the scheme has no definitive budget, and questions whether separating part of the horse tram work from the overall project hides the full cost.