i just took that road once, at that time i had a friend with me also. We were riding almost nonstop from Islamabad that day and thought of taking that route so we could cut 30Km off. but that wasn't a good decision. Road condition isn't very good. Lots of heavy traffic and it isn't one way either.
The heavy traffic drivers are crazy there. I saw one truck overtaking other truck and he almost crushed the mehran coming from front, mehran had to get off the road completely to avoid the accident . My friend was driving, when same thing happened to us also few times, he just gave up and said he couldn't drive on road like this . I drove the rest of the way.