Digitally Printed Traffic Sign Guide (2019) Jess Howes / Monday, February 28, 2022 0 4952 Article rating: 1.0 The "Digitally Printed Traffic Sign Guide" (rev. 01, 2019) covers the requirements for digitally printed finished retroreflective traffic control signs on flat sheet aluminum and digitally printed traffic sign faces intended to be applied to a sign substrate. Sections 1-7 are included. View the Digitally Printed Traffic Sign Guide Read more