Passenger traffic was increased by the innovations of season tickets, cheap return tickets and faster trains, although the M&C avoided any timings that might interfere with its profitable goods traffic. Poor performance, poor facilities, and uncompetitive pricing by the M&CR had led to much of the coal raised in the northern coalfield going to Maryport by road, rather than rail; the shortcomings were addressed and the traffic won back. In 1857 (when of the 644,000 tons of coal shipped from West Cumberland 340,000 were shipped through Maryport) a larger dock (the Elizabeth Dock, covering 1.4 hectares) opened at Maryport, served by a short branch of the M&CR, built under an Act of 26 June 1855. Doubling the track became essential to accommodate the volume of mineral traffic and to facilitate reliable passenger services. This already been done from Maryport to Arkleby by 1847; it was extended to Wigton in 1858 (only after the widening of embankments). Doubling was then undertaken from the Carlisle end, the line being doubled throughout in November 1860 and passed for use by goods and passenger traffic 15 February 1861, double line operation throughout starting the next day. More coal waggons were purchased, and siding capacity increased. Coal exports from Maryport reached 466,000 tons/year by 1866; about 300,000 tons/year of this coming over the M&CR