The Birmingham and Gloucester Railway (B&GR) was the first name of the railway linking the cities in its name and of the company which pioneered and developed it; the line opened in stages in 1840, using a terminus at Camp Hill in Birmingham. It linked with the Bristol and Gloucester Railway in Gloucester, but at first that company's line was broad gauge, and Gloucester was a point of the necessary but inconvenient transhipment of goods and passengers onto 4 ft 8+1⁄2 in (1,435 mm) gauge that became the national standard. Nearly all of the original main line remains active as a "trunk" route, also known as an arterial route or line.