However, the plans faced opposition in several of the settlements which trains would cross; many objections were because the line has level crossings on main roads, thus additional trains would increase road congestion.
However, the Heathrow Airtrack scheme faced opposition in several of the settlements which trains would cross (see main article for more details and references). Many objections were because the line has many level crossings on main roads and the effect that additional trains would have on road congestion.