Location: Main St and Caswell Ave, Derby Line As we enter the USA, traffic from Canada should pull to the right to clear customs. Location: Main St and Elm St, Derby Line No reassurance shield as we head out of downtown Derby Line. Location: US 5 and Hammer Handle Rd, Derby Line State maintenance begins … Continue reading U.S. Route 5, QC-143/QC Int’l Boundary to VT-105