Compared to this, the corresponding car trip takes about 10 minutes. I never sat in heavy traffic because you can easily circumvent that in a car. However, I have been stuck in a bus sitting in a traffic jam for more than 30 minutes on many occasions. The bus can't change it's course and the bus drivers don't like letting you exit anywhere that isn't a bus stop. But at least you can read while your colleagues have already been home for a while.
Most people overlook that travel to and from stops and waiting for a connecting bus can add up significantly. And then there are all those things that time tables won't tell you.