A Study of Operating Speed Limits for Vehicles Driving on Ratchadamnoen Road Nakhon Si Thammarat

Abstract

The paper purposes to evaluate the effectiveness the speed limits of vehicles driving within speed limits areas on Ratchadamnoen road Nakhon Si Thammarat. Category 1: the speed limit at 60 kph was identified for the truck in which the total of self-weight of truck and truckload is over 1,200 kgs or passenger bus. Category 2: the speed limit at 45 kph was identified for trailer truck in which the total of self-weight of truck and truckload is over 1,200 kgs or tricycle. Category 3: the other vehicles or motorcycle out of category 1 and category 2 were identified to driving with the speed limit at 60 kph. By measuring the speed of vehicles on Ratchadamnoen road. The research result showed that the category 1 and category 2 is the average speed traveled on Rome roads is higher than the specified speed. The category 3 and category 4 is the average speed traveled on this same road is not more than the specified speed. And suggested speed category 1-3 the speed limit at 50 kph. Category 4: the speed limit at 45 kph.