Crowd control barrier

History:
– Invention of crowd control barrier credited to Brussels mayor Jules Anspach
– Anspach erected mobile barriers during French photographer Nadar’s visit in 1864
– Crowd control barriers known as Nadar barriers in Belgian Dutch and Belgian French
– Metal and wooden barriers used by NYPD
– Interlocking steel barriers patented in France in 1951

See also:
– Chicane (barrier)
– Crowd control
– Temporary fencing
– Vinyl fence
– Privacy fencing

Notes:
– Newly designed mills barriers
– Hong Kong Government press releases
– Citations for further reading provided

External links:
– Wikimedia Commons related to crowd control barrier