A lone traffic officer stands at crisp attention in the center of Canal Street as a procession of gleaming late-1930s automobiles — streamlined sedans in slate blue and charcoal — funnel toward the white Art Deco portal of the Holland Tunnel in this vivid linen-era snapshot of New York City infrastructure at its glamorous best. Opened on November 13, 1927, the Holland Tunnel was a marvel of engineering: its twin tubes stretched 5,480 feet beneath the Hudson River, and its novel mechanical ventilation system — designed by engineer Ole Singstad after the death of the project's namesake, Clifford Holland — solved what had seemed an insurmountable problem of carbon monoxide buildup in a vehicular tunnel. The Curt Teich linen palette turns the white portal almost luminous against the warm brick and cream facades of the surrounding Lower Manhattan buildings, and the policeman's posture captures an era when traffic control was a one-man job and the tunnel entrance felt like the gateway to a modern world. Published by Frank E. Cooper, the same Broadway distributor behind card PC-04839 in this batch, connecting both cards to the same retail postcard trade network of Depression-era New York.