The popular phrase “Keep on Truckin’” certainly captured the heroism of truckers all over the country during the pandemic. Despite threats to their health and fears of driving to unknown territories, they stayed true to their jobs and transported food, supplies and medicines. Julio Guzman, 61, of Woodbridge is a perfect example. An independent trucker, he worked for Amazon on weekends and a local freight line other times. On his New York City routes, he occasionally came across coffins being stacked up outside. “It really hit me, this thing is real,” he said. But he only stopped for one week. …