Cameras using number plate recognition technology would be used to catch motorway users who had not paid the higher rate.

BBC: UK Politics

Police patrols using speed cameras and number plate recognition will be stationed on major roads including the M5, M4, M32 and A303.

BBC: Somerset

In April British members of Parliament learned that almost a year earlier the home secretary, Jacqui Smith, had secretly authorised the transfer of licence-plate data recorded by roadside cameras to foreign intelligence agencies.

ECONOMIST: Data mining

Instead of tollbooths London is using digital cameras that snap license plate photos as vehicles pass underneath.

FORBES: Drive-By Pricing

The plan involves an extensive network of cameras, licence-plate readers and weapon-detectors.

ECONOMIST: Terrorism

The system can gather data from security cameras, license-plate readers, radiation detectors and 911 calls and hunt through dozens of existing law-enforcement databases for related information.

WSJ: New Tracking Tool for NYPD

The initiative, which dates back to 2005, involves an extensive network of security cameras, licence-plate readers and weapon-detectors which work together to spot threats and deter terrorist surveillance.

ECONOMIST: New York expands its counterterrorism monitoring system

The cameras also can be linked to license-plate readers and radiation detectors.

WSJ: Cities Rethink Security After Boston Attack

Documents obtained through a Freedom of Information Act request and released Tuesday by the Electronic Privacy Information Center (EPIC) catalogue just how pervasive automatic license plate readers have become at the Mexican and Canadian borders, with cameras placed in dozens of U.S. cities each capturing images of millions or tens of millions of plates a year.

FORBES: U.S. Customs Tracks Millions Of License Plates And Has Shared Data With Insurance Firms