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By Tom Krisher The Associated Press

Consumer Reports: Tesla automated lane changes are risky

DETROIT — A new automatic lane-change feature of Tesla’s Autopilot system doesn’t work well and could be a safety risk to drivers, according to tests performed by Consumer Reports.

The magazine and website tested “Navigate on Autopilot” and found it less competent than human drivers, cutting off other cars without leaving enough space.

Cold weather can cut electric car range over 40 per cent

DETROIT — Cold temperatures can sap electric car batteries, temporarily reducing their range by more than 40 per cent when interior heaters are used, a new study found.

The study of five electric vehicles by AAA also found that high temperatures can cut into battery range, but not nearly as much as the cold. The range returns to normal in more comfortable temperatures.

Heavy duty: Detroit 3 all roll out biggest pickups this year

DETROIT — Nicole Foster-Beck asks a lot of the heavy-duty pickup truck she uses on her 43-acre horse farm east of Dallas.

Aside from the daily hauling, her 2015 GMC Sierra has to be powerful enough to pull a heavy eight-horse trailer to competitions, yet cushy enough to keep people comfortable on trips as far away as Kentucky.

Electronic driving systems don’t always work, tests show

DETROIT — Testing by AAA shows that electronic driver assist systems on the road today may not keep vehicles in their lanes or spot stationary objects in time to avoid a crash.

The tests brought a warning from the auto club that drivers shouldn’t think that the systems make their vehicles self-driving, and that they should always be ready to take control.