In 1930, the TTC closed the Metropolitan Line but shortly reopened the portion between Glen Echo and Richmond Hill operating it as the North Yonge Railways until 1948.

Between 1909 and 1914, the Metropolitan line was at its maximum length running from the CPR crossing at Yonge Street to Sutton.

[1] A 1905 photo showed that the terminal was off-street at the south-west corner of Yonge Street and Birch Avenue.

From its Toronto terminal, the line ran northwards on the west side of Yonge Street until the northern brim of Hogg's Hollow.

At the south-west edge of Bond Lake on the east side of Yonge Street, there were a carhouse and a power station.

[9] The line was single track laid to Toronto gauge, and used double-ended cars to avoid turning loops.

[9] In 1895, the province granted the railway the right to build lines in York and Simcoe counties, to use any gauge and motive power of its choice, and to make agreements with other railways (steam or electric) for connections, running rights and the interchange of cars.

On February 1, 1897, the Metropolitan line was opened to Richmond Hill ending at a station located on Yonge Street at Lorne Avenue.

[4] The King George Hotel at the south-east corner of Timothy and Main streets in Newmarket served as a passenger depot for the radial line.

[10] To support this extension, the company built a steam powerhouse at Bond Lake with a capacity of almost 1,000 horsepower.

[7] In 1899, the railway acquired 200 acres of lakeshore land to create Bond Lake Park and generate passenger traffic for the Metropolitan line.

[10] On June 1, 1907, the T&YRR opened a 40 km (25 mi) extension of the Metropolitan line from Newmarket to Jackson's Point.

[11] On January 1, 1909, the T&YRR opened a 2.4 km (1.5 mi) extension of the Metropolitan line from Jackson's Point to Sutton.

Starting in 1911, there was a dispute between the T&YRR and the town, which wanted a double-track line but objected to its being on a private right-of-way crossing multiple sidestreets at grade.

The railway did not want to build a double-track line on Yonge Street, one reason being it would have to pay the town $600 per mile per track.

A legal decision at Osgoode Hall overrode the permission the Ontario Rail Board gave to the railway to build the diversion.

Until 1916, passengers had to walk 400 metres (1,300 ft) to transfer between the radial and city cars on Yonge Street.

[9] Hydro initiated a number of line improvements including track rehabilitation, a new station at Schomberg Junction, new waiting shelters, more passing sidings and additional service to Thornhill and Bond Lake Park.

[15] On November 2, 1922, the TTC opened the Yonge streetcar line to the city limits at Glen Echo.

Between 1922 and 1927, the Province and local municipalities built roads parallel to the line to Sutton as well as the branch to Schomberg.

[15] The Glen Echo carhouse later became North York Township Market and then as Lawrence Motors Limited.

This allowed single-ended streetcars to supplement the double-ended radial cars in carrying crowds of visitors to the park.

The streetcars included four six-motor trains (pairs of ex-Toronto Railway Company streetcars operated in multiple-unit pairs), ex-Toronto Civic Railways double-ended car 2160 (class H-2) and three Peter Witt motors.

[6] On March 16, 1930, the TTC closed the Lake Simcoe (formerly Metropolitan) line after radial car 74 from Thornhill arrived in Toronto at 1:15 am.

[15] On July 17, 1930, the TTC reopened a portion of the defunct Lake Shore line between Richmond Hill and Toronto as the North Yonge Railways.

The TTC converted the former motor shops of the Toronto Railway Company on Sherbourne Street into a freight terminal.

These cars were fitted with air whistles, large-flange wheels, and flag and marker light brackets.