These critical safety signs alert drivers to the imminent danger of passing a stopped train, helping prevent potentially catastrophic accidents at railroad crossings. Constructed from durable, reflective aluminum, the sign ensures maximum visibility in all lighting and weather conditions. Compliant with both DOT and MUTCD standards, this R15-5a design features standard punched blanks for straightforward installation. Available in high intensity and diamond grade options, the sign meets state and federal regulatory requirements while providing clear, unmistakable guidance to motorists approaching railroad crossings.