The state highway was paved within Cambridge and extended west to Town Point Road by 1923. The state highway was extended to Lloyds in 1928 and was under construction west to Cornerville by 1930. MD 343 was completed to Hudson by 1933.
A road connecting Cambridge to the west was built and improved by 1923, reaching Town Point Road. Subsequent development led to its expansion to Lloyds in 1928 and construction of a new western route to Cornerville by 1930. MD 343 was completed to Hudson by 1933.