About 5 million cars in 1960s vs over 30 million now. But that journey done today would be practically all on the M4, a 3 lane uninterrupted motorway, so capaci

About 5 million cars in 1960s vs over 30 million now. But that journey done today would be practically all on the M4, a 3 lane uninterrupted motorway, so capacity has massively increased.