The proposals are intended to protect London’s finance district and its skyscrapers from a terrorist attack.
MI5 and counter-terrorism police have proposed to install the manned checkpoints, rising street bollards and crash-proof barricades.
When the IRA bombed the Baltic Exchange in April 1992, three people died and 91 people were injured.
A Corporation of London report said they "had identified that the area was highly sensitive to... a hostile vehicle-borne security threat".
Security across Europe is striving to beat terror in the wake of the Berlin Christmas market terror attack on Monday when Anis Amri ploughed into shoppers, killing 12 and injuring 49 people.