Several conservative politicians had filed a lawsuit rejecting the decision to allow voting in about ten locations in Houston, an area where Democrats are strong in the otherwise traditional Republican state of Texas.
The possibility to vote without leaving your car was introduced to reduce the risk of infection spreading during the corona pandemic.
The Supreme Court of Texas has previously rejected similar attempts by, among others, the Republican Party in the state to stop the drive-in vote.
Many litigation
Hundreds of similar disputes over the election process have ended up in court ahead of the US election.
Democrats have generally tried to facilitate postal voting and other alternatives to appearing in person at the polls, while President Donald Trump and Republicans have warned of the dangers of electoral fraud.
Another dispute was settled on Monday in Nevada, where a judge ruled that the vote count in Las Vegas was correct.
The verdict is a setback for Republicans who wanted the procedure rejected.
No errors found
The protests were filed by the Trump campaign, the Republican Party in Nevada and a single voter on October 23.
They claimed that the vote count was surrounded by a number of problems.
Among other things, election observers must not have been able to monitor the procedure and ballot papers must have been handled in an inappropriate manner.
But Judge James Wilson states that the complainants have not been able to show that the handling has involved or will lead to inaccuracies in the counting of votes.
The protests took place in Clark County, the state's largest county where the city of Las Vegas is located.
President Donald Trump is after Democratic candidate Joe Biden in Nevada, one of a dozen wavemaster states that can decide Tuesday's presidential election.