A ride on one such bus on the A10 highway out of Paris shows how the president-elect might try to change France -- and the challenges he may face after his inauguration on Sunday.
The ride took place on a national holiday -- so most French businesses were closed and the streets of the capital were empty. But the bus was an exception. Fully booked, it was heading to Orleans, Poitiers, all the way south to France's famous wine region of Bordeaux.
"I find it good. Competition brings down prices, we see it with Uber taxis nowadays," said Anthony Coste, a 24-year- old sales manager returning to live with his family in Bordeaux after three years in Paris.
"It should happen with more things too," he told The Associated Press. "Competition forces companies to make an effort."
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A train ticket to Bordeaux would have set him back more than USD 76 but his ticket with bus company Ouibus cost only USD 27.
The so-called "Macron Law," the 39-year-old's keystone achievement, has a mixed legacy. It aimed mainly to free up France's notoriously inflexible labor rules but was opposed by many on the left and provoked widespread protests.
Some 6.2 million people took Macron buses to get around in the year after the law, according to the National Federation of National Travelers. However, the law fell dramatically short of its goal of creating 22,000 jobs, according to French media.
"It represents this Uberization. We're willing to pay less and give up good service," said Pierre France, a 29- year-old researcher taking the bus to Poitiers.
"It's an economic choice that we make purely based on cost, because it's much cheaper, but without thinking about the long-term consequences it could have," he added.
But he acknowledged the law has its benefits. A frequent traveler, he has encountered people from low-income communities on his bus trips who wouldn't have been able to travel at all otherwise.