Route 41 is the main road for lower southern provinces. It starts at Pathomporn Intersection. At this intersection, Route 4 changes direction to the west coast of southern part. Route 41 goes directly southward which is shorter for most southern provinces.
Total length is about 390 km. About 110 km is in Chumphon Province, 140 km in Surat Thani Province, 105 km in Nakhon Si Thammarat Province and 35 km in Phatthalung Province. Route 41 is 4 lane, 2 lane for each direction with ditch to separate direction.
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