L-shaped brackets hold tools
https://www.codot.gov/programs/colorado-transportation-matters/statewide-transportation-plans/progress-made
https://www.codot.gov/programs/planning/transportation-plans-and-studies/assets/images/l-shaped-brackets-hold-tools/view
https://www.codot.gov/programs/planning/transportation-plans-and-studies/assets/images/l-shaped-brackets-hold-tools/@@download/image/L-shaped brackets hold tools.jpg
L-shaped brackets hold tools
https://www.codot.gov/programs/colorado-transportation-matters/statewide-transportation-plans/progress-made