Gov. Greg Abbott on Sunday tightened travel to Texas by ordering some motorists from Louisiana to self-quarantine for two weeks.

The new restrictions, effective noon Monday, came as President Donald Trump extended social distancing guidelines through April 30, preventing all nonessential travel in the country.

Louisiana’s status as a hot spot for the novel coronavirus grew Sunday to more than 3,500 positive cases statewide. Under the new rules, drivers with commercial, medical, emergency response, military or critical infrastructure purposes for entering Texas would be exempted.

A spokesman for the Department of Public Safety said Sunday the agency was not prepared to comment on the details of the new measures.

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State troopers will enforce the order at checkpoints at major roadways along the border. Those in quarantine will be asked to provide an address for where they plan to hole up in Texas, either for two weeks or until their return to Louisiana, whichever comes first.

A provision in the order allows DPS special agents to check on those under quarantine to ensure they’re complying. Violators could be subject to either a $1,000 fine or 180 days in jail, according to the four-page document. Another provision states that if a driver is showing symptoms associated with COVID-19, such as fever, coughing or shortness of breath, a trooper will follow them to their destination.

The Texas order mimics Florida, the governor of which on Friday required drivers from Louisiana to also quarantine upon entering their state. Motorists from Louisiana would have to cross both Alabama and Mississippi to make it to Florida.

The Louisiana border is 113 miles from Houston on I-10.

Other states have formulated their own travel restrictions amid the heightening emergency. Kentucky Gov. Andy Beshear told residents to limit travel to Tennessee unless absolutely necessary. The governors of Alaska and Hawaii required all out-of-state travelers to self-quarantine for two weeks. Like Texas, Rhode Island has asked travelers returning from hot spots such as New York to self-isolate.

Residents of New York, New Jersey and Connecticut are under a travel advisory as the number of deaths in the United States from the novel coronavirus doubled to more than 2,000 over a 48-hour period. The Centers for Disease Control and Prevention issued the travel advisory Saturday and urges residents “to refrain from non-essential domestic travel for 14 days effective immediately.”

Delaware’s governor has issued an order telling out-of-state visitors to self-quarantine for two weeks.

The order by Gov. John Carney takes effect Monday morning and requires anyone entering the state from elsewhere to self-quarantine for 14 days. It does not apply to people who are only passing through the state.

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“Now’s not the time to visit Delaware. We’re facing a serious situation here that is getting worse,” Carney said in a statement.

In Houston, Mayor Sylvester Turner said he urged travelers returning to Texas to do the same more than three weeks ago, regardless of where they had been.

“If you leave Texas and come back to Texas, you should self-quarantine,” Turner previously said at a news conference. “Nobody should be traveling unless you absolutely have to.”

Abbott’s executive order is an expansion of what he previously issued for air travelers from New Orleans, where 1,350 COVID-19 cases have been diagnosed as of Sunday night.

Also on Sunday, Abbot expanded air travel restrictions for passengers arriving from Washington, California, Miami, Detroit, Atlanta and Chicago. They, too, will be told to quarantine.

On Sunday, a Baton Rouge resident said her ex-husband, who lives in Texas, was worried he would be forced to quarantine if he dropped off their children, as required through a court order, and tried crossing the border soon after.

He took the kids to their mother’s Sunday night and did not see any hint of a checkpoint as he entered Louisiana, she said, declining to be identified.

She wondered where the checkpoints would be pitched with I-10 already packed with construction.

Julian Gill and the Associated Press contributed to this report

nicole.hensley@chron.com