The Edinburgh and Northern Railway was a railway company authorised in 1845 to connect Edinburgh to both Perth and Dundee. It relied on ferry crossings of the Firth of Forth and the Firth of Tay, but despite those disadvantages it proved extremely successful. It took over a short railway on the southern shore of the Forth giving a direct connection to Edinburgh, and it changed its name to the Edinburgh, Perth and Dundee Railway.

The Edinburgh, Leith and Newhaven Railway was a railway company formed in 1836 to connect the city of Edinburgh with the harbours on the Firth of Forth. When the line connected to Granton, the company name was changed to the Edinburgh, Leith and Granton Railway. It opened part of its route in 1846, but reaching the centre of Edinburgh involved the difficult construction of a long tunnel; this was opened in 1847. It was on a steep incline and was worked by rope haulage.