Got stuck behind this bulldozer for most of the way to office, going 30kmh with cars coming on the other side, thus cant overtake.
Same thing with lorries. Overloaded, travelling at 30 to 40kmh and having a long train of cars following behind. Or worse, overloaded, and on the right side of the road, with a slower lorry on the left side of the road, thus stopping all traffic behind them. Common on the 6 to 10th Mile road.