Type 3 Barricades made out of what?

Whether you know it or not, type 3 barricades are either made out of plastic or wood.  And it isn’t as simple as just that.  You can also get traffic barricades that are either ‘blow molded’ or ‘injection molded’.

The difference is that one is ‘filled’ with plastic in the panel while the other panel is hollow.  This means that if a panel that is filled is hit with a car, chances are it will hold the impact better than a panel that is hollow.