Complex sentence: By 1947 the Ohio Department of Highways was constructing new roads at the quickest pace in their history, with 422 contracts awarded, $38 million spent on new construction, and $4 million on maintenance.
Split into simpler sentences: By 1947 the Ohio Department of Highways was constructing new roads at a record pace. They awarded 422 contracts, spending $38 million on new construction and $4 million on maintenance.