They are maintenance free and can easily be installed by one person.
Justrite 9ft Standard Recycled Plastic Speed Bump with Steel Spike Hardware, Yellow, SB9S-SY Checkers™ speed bumps are made with 100% recycled solid plastic and alert drivers to potentially hazardous driveways and parking areas.| Justrite 9ft Standard Recycled Plastic Speed Bump with Steel Spike Hardware, Yellow, SB9S-SY Checkers™ Speed Bumps are molded in solid colors and never need painting. They will not chip or crack under heavy loads and are built to withstand abuse from gas, oil, salt, sunlight, and chemicals.