After 1945, Hart undertook an ambitious program of rural electrification, hydroelectric and highway construction. Hart's most significant projects were the construction of Highway 97 to northern British Columbia (which is now named in his honour) and the Bridge River Power Project, which was the first major hydroelectric development in British Columbia. He established the BC Power Commission, a forerunner of BC Hydro, to provide power to smaller communities that were not serviced by private utilities. In December 1947, Hart retired as Premier. The Conservative Party agitated for its leader, Herbert Anscomb, to succeed Hart as Premier but the Liberals outnumbered the Tories in the coalition caucus and Hart was followed by another Liberal, Byron Johnson, known as "Boss" Johnson, with Anscomb as Deputy Premier and Minister of Finance. Johnson's government introduced universal hospital insurance and a 3% provincial sales tax to pay for it. It expanded the highway system, extended the Pacific Great Eastern Railway, and negotiated the Alcan Agreement, which facilitated construction of the Kenny Dam. The government also coped with the 1948 flooding of the Fraser River, declaring a state of emergency and beginning a program of diking the river's banks through the Fraser Valley. Johnson is also noted for appointing Nancy Hodges as the first female Speaker in the Commonwealth. The Liberal-Conservative coalition government won the 1949 election – at 61% the greatest percentage of the popular vote in BC history. Tensions had grown between the coalition partners and within both parties. The Liberal Party executive voted to terminate the coalition and Johnson dropped his Conservative ministers in October 1951 resulting in a short lived minority government which soon collapsed. In order to prevent the CCF from winning in a three party competition, the government introduced instant-runoff voting, with the expectation that Conservative voters would list the Liberals as their second choice and vice versa. Voters however, were looking for alternatives. More voters chose British Columbia Social Credit League ahead of any other party as their second choice. Social Credit went on to emerge as the largest party when the ballots were counted in the 1952 general election. Social Credit's "de facto" leader during the election, W. A. C. Bennett, formerly a Conservative, was formally named party leader after the election. At the 1953 general election, the Liberals were reduced to 4 seats, taking 23.36% of the vote. Arthur Laing defeated Tilly Rolston in Vancouver Point Grey. Although Social Credit won a majority of seats in the legislature, their finance minister Einar Gunderson was defeated in Oak Bay by Archie Gibbs of the Liberals.