N55 is better saves about an hour. The entire road is newly build and I would say is better then karachi Hyderabad motorway.
Mtag is avalible 24/7 you can get a mtag issued at karachi just before karachi toll plaza.
It is useful at Hyderabad toll plaza and then usefull at lahore
For smaller cities between Hyderabad and sukker and till lahore you will have to use cash.
Only lahore Islamabad and Islamabad Peshawar motorways are fully automated.
Rest is all 50/50.
If you leave early around 6 am. You'll cross Moro taj before lunch you can get a tea break. Taj hotel at rohri is a better place (time wise for lunch) just a few kilometers after where motorway M5 starts.
You'll have to make a Uturn and come back to start motorway.
You can also have a tea break and refuel before motorway starts at bedal petrol pump.
If you refuel at bedal and have lunch at Rohri Taj hotel, you won't have to stop anywhere on 380 km sukkher multan motorway. Taj hotel Rohri also has a Shell pump we refulled from there.
Their are atleast 3 petrol pumps functional on both sides (total 6) on the 380 km motorway.
Location for Taj hotel Rohri (it's on main road you Shell Pump) don't make google take u inside lanes)
Royal Taj Restaurant Rohri
0345 8250815
https://maps.app.goo.gl/mudjaAFfsKxJYCDm8
PSO Beadal Petroleum Services
0305 5665158
https://maps.app.goo.gl/vtb3ehxthNfVUY2M6