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Winter Quirks with Tesla’s Cruise Control System

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I use cruise control a lot when driving. Highways, back roads, you name it. My main motive for using cruise control as much as I do is to avoid the urge to speed. After all, it’s far too easy to speed in the Model S with its smooth instant acceleration and lack of engine noise.

I did a fairly detailed review of the Model cruise control system back in the spring of 2014 but it turns out there’s more to the story than I originally thought. The frigid New England temperatures have affected battery range and the ability to use regenerative braking but little did I know that it would also affect the cruise control system.

Model S Cruise Control and Cold Weather

Cruise control is designed to maintain a constant speed without having to use the accelerator pedal. On level terrain it’s pretty reliable in terms of keeping a constant speed, but results begin to vary when going downhill with cruise control on.

In most ICE cars, cruise control will not apply the brakes but will leave the car in gear allowing the vacuum of the engine and engine braking to slow the car down. Some cars will also downshift to further increase engine braking as a means of slowing the vehicle.

The Model S on the other hand has no engine or transmission that can be used for engine braking. Because of this the Model S cruise control system relies strictly on the effects of regenerative braking to slow the car down. When regenerative braking is limited, the rate in which the vehicle decelerates is also limited which in turn limits the ability for the vehicle to automatically slow down.

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Unlimited Cruise

Tesla Model S cruise control ineffective when regenerative braking is limited due to cold weather conditions.

In the image above, I had cruise control set at 40MPH but because of the limited regenerative braking due to cold weather combined with a down hill decent, the Model S ended up plowing right past the 40 MPH mark as gravity took hold of the car. I ended up speeding 13 MPH over the cruise control  speed.

Model S owners get to choose between standard and low regenerative braking but it doesn’t make that much of a difference during cold weather conditions since regen as a whole will be limited.

There is Tesla Life Outside of California

Some California Tesla friends were surprised that I was concerned about this winter quirk. Their thought was that the Model S would operate normally after a short warm up period and this issue shouldn’t be considered a big deal. They suggested I accelerate hard a few times to get the vehicle back to “normal” temperatures but that’s easier said than done when you’re dealing with winter road conditions.

Tesla-Model-S-winter-snow

Warming 7,000 battery cells up to optimal operating temperatures takes time. Here in New England with temperatures well below the 40’s, it often takes 45 minutes of highway driving before regen kicks back in and can accept over 30kW. But more often than not I’m driving without regenerative braking because of the cold weather.

30kW of regenerative braking is needed for slowing the car down. Anything less and the car begins to gain speed as it begins to roll downhill. How fast it gains speed really depends on how limited the regen is.

If you live in colder climates and use cruise control on your Model S, beware of this winter quirk or run the risk of picking up a hefty speeding ticket.

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"Rob's passion is technology and gadgets. An engineer by profession and an executive and founder at several high tech startups Rob has a unique view on technology and some strong opinions. When he's not writing about Tesla

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Tesla robotaxi test details shared in recent report: 300 operators, safety tests, and more

Tesla has launched an initial robotaxi service for its employees in Austin and the San Francisco Bay Area.

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Credit: Tesla

During the Q1 2025 earnings call, Tesla executives reiterated the idea that the company will be launching a dedicated robotaxi service using its Full Self Driving (FSD) Unsupervised system this coming June.

A recent report from Insider, citing people reportedly familiar with the matter, has now provided a number of details about the preparations that Tesla has been making as it approaches its June target date.

Remote Operators

As noted by the publication, about 300 test operators have been driving through Austin city streets over the past few months using Teslas equipped with self-driving software. These efforts are reportedly part of “Project Rodeo.” Citing test drivers who are reportedly part of the program, Insider noted that Tesla’s tests involve accumulating critical miles. Test drivers are reportedly assigned to specific test routes, which include “critical” tracks where drivers are encouraged to avoid manual interventions, and “adversarial” tracks, which simulate tricky scenarios.

Tesla has launched an initial robotaxi service for its employees in Austin and the San Francisco Bay Area, though the vehicles only operate in limited areas. The vehicles also use safety drivers for now. However, Tesla has reportedly had discussions about using remote operators as safety drivers when the service goes live for consumers. Some test drivers have been moved into remote operator roles for this purpose, the publication’s sources claimed.

While Tesla is focusing on Austin and San Francisco for now, the company is reportedly also deploying test drivers in other key cities. These include Atlanta, GA, New York, NY, Seattle, WA, and Phoenix, AZ.

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Safety Tests

Tesla reportedly held training events with local first responders as part of its preparations for its robotaxi service, Insider claimed, citing documents that it had obtained. As per the publication, Tesla had met with the city’s autonomous vehicle task force, which include members of the Austin Fire Department, back in December.

Back in March, Tesla reportedly participated in about six hours of testing with local first responders, which included members of the fire department and the police, at a close test track. Around 60 drivers and vehicles were reportedly used in the test to simulate real-world traffic scenarios. 

Interestingly enough, a spokesperson from the Austin Police Department stated that Tesla did hold a testing day with emergency responders from Austin, Williamson County, as well as the Texas Department of Public Safety.

Reported Deadlines

While Tesla has been pretty open about its robotaxi service launching in Austin this June, the company is reportedly pursuing an aggressive June 1 deadline, at least internally. During meetings with Elon Musk, VP of AI software Ashok Elluswamy’s team reportedly informed the CEO that the company is on track to hit its internal deadline.

One of Insider’s sources, however, noted that the June 1 deadline is more aspirational or motivational. “A June 1 deadline makes a June 30 launch more likely,” the publication’s source noted.

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Atty who refused to charge six-time Tesla vandal sparks controversy

Despite the multiple offenses, Moriarty opted to enter Adams into an adult diversion program instead.

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Pilottap, CC0, via Wikimedia Commons

Hennepin County Attorney Mary Moriarty, who made the decision not to charge 33-year-old vandal Dylan Bryan Adams after he keyed six Teslas around Minneapolis last month, has found herself in the middle of controversy

The controversy came amidst her decision to press charges against a 19-year-old first-time vandal who keyed one vehicle at the White Castle in Brooklyn Park.

The Tesla Vandal

Moriarty’s decision not to charge Adams after he keyed six Teslas was met with widespread criticism. Adams’ actions resulted in more than $20,000 worth of damages, more than $10,000 of which was to a single vehicle, as noted in a New York Post report. Yet despite the multiple offenses, Moriarty opted to enter Adams into an adult diversion program instead.

The fact that Adams is a state employee who works for the Department of Human Services as a program consultant triggered allegations that his dismissal might be partly influenced by Gov. Tim Walz. Walz is a staunch critic of Musk, previously stating that the falling price of TSLA stock gives him a “boost” in the morning.

As noted in a report from The Minnesota Star Tribune, Moriarty’s decision was so controversial that she was asked about the matter on Wednesday. In response, the attorney argued that her office made the decision outside of any political consideration. “We try to make decisions without really looking at the political consequences. Can we always predict how a story will be portrayed in the media or what people will say? No,” Moriarty stated.

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Actually Charged

As noted by the Tribune, Moriarty has made arguments around the fact that Adams was a first-time offender, even if he opted to deface six separate Teslas. But even this argument has become controversial since Moriarty recently charged a 19-year-old Robbinsdale woman with no criminal record with first-degree felony property damage after she allegedly keyed a co-worker’s car. The damage incurred by the 19-year-old woman was $7,000, substantially less than the over $20,000 damage that Adams’ actions have caused.

Cases surrounding felony first-degree property damage are fairly common, though they require the damage to be over $1,000. The 19-year-old’s damage to her co-worker’s car met this threshold. Adams’ damage to the six Teslas he vandalized also met this requirement.

When Moriarty was asked about her seemingly conflicting decisions, she noted that her office’s primary goal was to hold the person accountable for keying the vehicle and get restitution to the people affected. She also noted that her office tries to avoid convictions when possible since they could affect a person’s life. “Should we have treated this gentleman differently because it’s a political issue? We made this decision because it is in the best interest of public safety,” she noted.

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Tesla faces emission credits tax in Washington state

House Bill 2077 taxes emissions credits, mainly hitting Tesla. Lawmakers expect $100M/year from the taxes.

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(Credit: Tesla)

Washington state lawmakers are advancing a bill that would tax Tesla’s emission credits, targeting profits under the state’s clean vehicle policy. Lawmakers who support the bill clarify that the Tesla credit tax is unrelated to Elon Musk.

HB 2077, introduced in mid-April, seeks to impose a 2% tax on emission credit sales and a 10% tax on banked credits. The bill primarily affects Tesla due to exemptions for companies with fewer credits.

In 2022, Washington’s Department of Ecology mandated that all new cars sold by 2035 be electric, hydrogen-fueled, or hybrids, with 35% compliance required by next year. Carmakers selling more gas-powered vehicles can buy credits from companies like Tesla, which sells only electric vehicles.

A legislative fiscal analysis projects taxes on those credits would generate $78 million in the 2025-27 biennium and $100 million annually thereafter. About 70% of the taxes will be allocated to the state’s general funds, and the rest will help expand electric car infrastructure.

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HB 2077 passed the state House eight days after its introduction and awaits a Senate Ways and Means Committee vote on Friday. At a House Finance Committee hearing, supporters, including union and social service advocates, argued the tax would prevent cuts to state services.

House Majority Leader Joe Fitzgibbon emphasized its necessity amid frozen federal EV infrastructure funds. “We didn’t have a budget crisis until this year. And we didn’t have the federal government revoking huge amounts of federal dollars for EV infrastructure,” he said.

Tesla’s lobbyist, Jeff Gombosky, countered that the proposal “runs counter to the intent” of the state’s zero-emission policy. Rivian’s lobbyist, Troy Nichols, noted a “modest” impact on his company but warned it could undermine the EV mandate. Kate White Tudor of the Natural Resources Defense Council expressed concerns, stating, “We worry it sets a dubious precedent.”

Fitzgibbon defended the tax, noting Tesla’s dominant credit stockpile makes it “one outlier” that is “very profitable.” “That’s the kind of thing legislators take an interest in,” he said. “Is it serving the interest of the public for this asset to be untaxed?”

With the legislative session nearing its end, the bill remains a key focus in budget talks in Washington.

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