Squabble Over EU’s Border Costs Millions in Snarled Trade

Renault SA’s Dacia brand is known for being an affordable car, but few drivers in Europe might realize the time and cost it takes for their vehicles to make it from the factory in Romania.

Trucks delivering the hatchbacks need to wait anything from a few hours to a few days in lines stretching kilometers at the border with Hungary to enter the European Union’s Schengen Area, the customs-free zone that covers most of the bloc but not Romania or Bulgaria.

After years of negotiations, the two Black Sea nations will get a concession on March 31: they will join Schengen for air ...