The junction with the Edinburgh and Glasgow Railway at Greenhill gave satisfactory access for Scottish Central trains to Glasgow Queen Street, but was inconvenient for Edinburgh. In the 1846 Parliamentary session, the E&GR submitted a Bill for the Stirlingshire Midland Junction Railway, which was to build from Polmont to a junction near Larbert, giving a direct connection.
The junction at Greenhill provided convenient access for Scottish Central trains to Glasgow Queen Street, but was inconvenient for Edinburgh. In 1846, the E&GR proposed a Bill for the Stirlingshire Midland Junction Railway, which aimed to construct a line from Polmont to a junction near Larbert, offering direct connection.