Concrete blocks to prevent vehicle parking on vacant lot left after the destruction of a building. It works like lego to store them. It can also be used to protect events. :
Cox Hardware and Lumber - Heavy Duty Concrete Truck Stop with Pins, 6 Ft
Concrete Bumper Blocks In Florida | Liberty Sealcoat LTD
Acton Precast Concrete Limited
Concrete Parking Bumpers, Drain Parking Bumpers, Parking Bumper, Bin Blocks, Concrete Bin Blocks, Concrete Barrier, Site Furnishings, Bollards, Concrete Bollards
Acton Precast Concrete Limited
60 in. x 9 in. x 5 in. Parking Bumper 120P/B - The Home Depot
Concrete vs. Rubber Wheel Stops: A Comparison and Buying Guide