By City A.M. Reporter Millions of people are expected to embark on summer getaways on Saturday, with airports and ports braced for their busiest weekend of the year. Motorists could also face a “weekend of woe”, with motoring group RAC predicting the second busiest summer weekend since 2015. A total of 3.6 million car journeys are expected on Saturday, with another 2.9 million trips on Sunday, as the school holidays get under way. The RAC said the weekend – including trips taken on Friday – would be second only to 2022, during the hot summer that followed two years of coronavirus lockdowns. Th…