Some lower Manhattan residents are suing police over the security plan for the World Trade Center site.
The WTC Neighborhood Alliance filed a suit Thursday in Manhattan.
The plan calls for 3-foot-tall barriers and a secured zone around the trade center. Only vehicles that can prove they have business in the trade center or have been previously certified would be allowed in.
The suit says the plan will leave the center in "fortress-like isolation" and the area around it "as impervious to vehicular traffic as the Berlin Wall."
The city Law Department says the importance of security at a site that terrorists targeted "cannot be overstated."
City lawyers note that pedestrians and bicyclists will be able to move freely there.
The suit asks to get the plan annulled.
