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The Barnacle is the newest way for parking enforcement to immobilize cars. No boot required.

Each week we compile the best announcements and developments from the world of cars.

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This sedan can drive past a drug lab and report it.

It's like a modern version of Robocop's Taurus.

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Got a bike rack or trailer hitch? One court says that's reasonable grounds for a traffic stop.

Most states have laws that require car owners to ensure their license plates remain visible and clear of obstructions. In practicality, that can be cumbersome. Trailers, trailer hitches, bike racks and other ordinary vehicle equipment can often restrict that view.

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Maintenance Logs: 80 Percent Of Department's Dashcams Don't Record Audio

After waiting several months, the Chicago police officer who shot and killed Laquan McDonald finally had a broken dashcam in his squad car repaired on June 17, 2014. A day later, it was reported broken again.

You’re having dinner with friends.

We’ve all seen it, or been guilty of it.

ETC

One Sheriff's Office Brings Surprise Cheer To Motorists This Holiday Season

In Kansas City, MO, some motorists are receiving a holiday surprise instead of a ticket.

ETC

A New Jersey woman made a fake 911 call last week to distract police so she could drive home drunk from a bar.

Video

Texas Grandfather Had Underestimated Rising Waters

A Texas man and his grandson were trapped in their Honda Odyssey minivan by rising floodwaters last week. Two police officers who happened upon the scene pulled the pair to safety.

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Virgina Lawsuit On License-Plate Reader Data May Be First Of Its Kind

A Virginia motorist is demanding his local police department stop holding onto driving records collected by automated license-plate readers.

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Delays Could Infringe Upon Motorists' Fourth Amendment Rights

Police officers cannot detain motorists for any longer than necessary during ordinary traffic stops.

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Bills Received Bipartisan Support; One Could Set Nation's Shortest Retention Limit

Virginia could soon set the strictest limits in the nation on how long law-enforcement agencies can retain automated license-plate reader records.

Video

Passenger Catches Traffic Stop On Video; NYPD Investigating Incident

A New York City police detective was caught on video berating an Uber driver for allegedly committing a minor traffic squabble. Warning: explicit language in the video.

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Traffic Deaths Are Down In The City, But Safety Plan Draws Criticisms

Vision Zero, New York Mayor Bill de Blasio's ambitious plan to end all traffic deaths, has already improved safety, but not everybody is happy.

Followup

Ars Technica Shows How LPR Data Can Be Used To Discern Daily Habits

In response to a public-records request, the Oakland Police Department released 4.6 million records from its license-plate readers. Here's what they show.

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In Miami, Law-Enforcement Officers Concerned Over Heightened Risk

Police officers in one major U.S. city are fighting back against Waze, a popular mobile app that reveals their locations to motorists.

ACLU: DEA Has Mined License-Plate Reader Data Since 2008

The US government is tracking the whereabouts of millions of American motorists. Through the use of license-plate readers, federal authorities have collected and stored approximately 343 million records that detail the location of drivers around the country and housed them in a new national database.

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Protesters Rallied Against Speed Cameras Sunday In One Long Island County

On election night, Jason Sonenshein merely hoped an anti-traffic camera ballot initiative for which he had campaigned would squeak out a win.

Four Anti-Enforcement Ballot Measures Pass By Wide Margins

There's ongoing debate over the need for traffic cameras that aim to catch red-light runners and speeding motorists. Law enforcement officials say they promote safer driving. Critics say they're nothing more than a money grab.