The last major promotional activity of the LHA took place on September 1, 1928, when at 1:00 p.m. groups of Boy Scouts placed approximately 2,400 concrete markers at sites along the route to officially mark and dedicate it to the memory of Abraham Lincoln. Less commonly known is that 4,000 metal signs for urban areas were also erected then. The markers were placed on the outer edge of the right of way at major and minor crossroads, and at reassuring intervals along uninterrupted segments. Each concrete post carried the Lincoln Highway insignia and directional arrow, as well as a bronze medallion with Lincoln's bust stating, "This Highway Dedicated to Abraham Lincoln".