(Bloomberg) -- An often impenetrable logjam of trucks laden with coal at South Africa’s crossing with Mozambique has brought chaos to a sleepy border town.Most Read from BloombergAsia’s Richest Families Fuel Race for Lucrative Finance JobsUS, Europe Are Growing Alarmed by China’s Rush Into Legacy ChipsCharles Koch-Tied Group Seeks to Block Trump From GOP NominationLots of US Homeowners Want to Move. They Just Have Nowhere to GoA 5% US Mortgage Rate Is Seen as Tipping Point to Unlock SupplyElepha