What is the general speed limit on national highways?

[McMarcus]

The speed limit on national highways is 60 to 80 kilometers per hour. Moreover, there are no traffic lights, the roads are wide, and they can save almost half the time. For a 400-kilometer journey, it may take just over four hours to reach the destination, whereas on national highways, it might take 6 to 7 hours. Domestic expressways generally have a speed limit of 120 kilometers per hour. National highways refer to main trunk roads with national political and economic significance, including important international highways, defense roads, roads connecting the capital with provincial, autonomous region, and municipal capitals, and roads linking major economic centers, port hubs, commodity production bases, and strategic locations. Rural roads generally belong to Class 3 highways. If there are no speed limit signs, the speed is usually not allowed to exceed 70 kilometers per hour. If there are speed limit signs, drivers should follow the indicated speed. Village sections, also known as rural roads, typically lack a central dividing line and are very narrow, with a general speed limit of 40 km/h. Some rural roads may not even accommodate two oncoming vehicles passing smoothly.