Description Affordable option for short-term column-style barriers that can be decorated or painted by volunteers. Must be combined with traffic cones or some other vertical element for stability. 
Typical Dimensions 1 - 2 ft. in diameter by 3 - 4 ft. in height.
Estimated Cost $1.50/unit, or free if cardboard can be sourced by donation.
Durability Demo: 1 day to 1 month installation.

Bikeways Bike East Bay created simple, attractive barriers by flattening cardboard boxes, rolling them into cylinders with binder clips at the top and bottom and setting them on top of standard orange traffic cones for stabilization. Depending on thoroughfare’s design speed, cylinders should be placed along the edge of bike lane every 8 - 20 ft. to create barrier, depending on the thoroughfare’s design speed or bikeway configuration.
Median Islands Place approx. 2 - 3 ft. apart to demarcate median area. Provide a minimum 6 ft. break for crosswalk / pedestrian accessibility. 
Curb Extensions / Plazas Place along edge of plaza or curb extension, approximately 1 post every 8 - 10 ft.

Avoid using if rain is likely during demonstration event. 
Work with local artists and volunteers to decorate the cylinders if possible.
Lightweight, collapsible, and easily moved / removed.
Only appropriate for very short-term projects.

Borrow boxes from residents / retail business owners.
Purchase from moving or office supply store.