BAZ RATNER THE queue of lorries snakes down the narrow tarmac road, stretching back as far as the eye can see on both sides of a sign that reads: "Welcome to Busia, the gateway to east and central Africa". Before COVID-19, Kenyan driver Joseph Kimani used to reckon with a five-hour wait to cross from there into Uganda with his cargo of diesel. Now the queue on the Kenyan side, which he and other drivers say extends for upwards of 60 km (37 miles), take five days to clear and, for them, life on the road has become literally that.…