History of King's Highway 7B (Carleton Place):
Highway 7B through Carleton Place was created out of route renumbering in the early 1960s. Originally, Carleton Place's Business Route was known as Highway 15B. In 1961, Highway 15 was rerouted between Smiths Falls and Carleton Place and the old route of Highway 15 between Perth and Carleton Place became an extension of Highway 7. This resulted in the renumbering of the Carleton Place Business Route, from Highway 15B to Highway 7B. The route of Highway 7B followed Townline Road, Bridge Street, Moore Street and Franktown Road. Initially, the north-south section of Highway 7B via Franktown Road, Moore Street and Bridge Street through Downtown Carleton Place was routed concurrently with Highway 29 (later renumbered as Highway 15). The non-assumed section of Highway 7B from Townline Road southerly to the Carleton Place Bypass was mostly under the jurisdiction of the Town of Carleton Place, whereas the east-west section of Highway 7B via Townline Road was under the jurisdiction of the Department of Highways of Ontario. In the late 1960s, the section of Highway 7B via Townline Road from the Highway 29 Junction at Bridge Street to the Town Limits near Walton Drive was transferred. Ownership of this section of Highway 7B was transferred from the province to the Town of Carleton Place, effective April 1, 1968. The entire route of Highway 7B through Carleton Place continued to be signed as a King's Highway under a Municipal Connecting Link agreement. The route of Highway 7B lying west of the Carleton Place Town Limits remained under provincial jurisdiction.
During the early 1970s, the routing of Highway 7B was shortened. Rather than return to Highway 7 via Bridge Street. Moore Street and Franktown Road, the highway was truncated at Highway 29 (later renumbered as Highway 15) north of Downtown Carleton Place. This change is believed to have taken place during 1974. In 1994, a new Highway 15 Bypass was opened along the eastern side of Carleton Place. This new route bypassed the old route of Highway 15 through Downtown Carleton Place. Highway 7B was extended easterly along Townline Road (Old Highway 15) for another 1.1 km, in order to meet up with the relocated route of Highway 15 at McNeeley Avenue. On January 1, 1998, the remaining provincially-owned section of Highway 7B was formally decommissioned and transferred to the County of Lanark. The former highway is now known as Lanark County Road 7B and Townline Road.