Abstrak

Role of toll roads to serve the main distribution highways and walkways of existing roads with the aim to facilitate and expedite the flow of traffic. But at a certain time on the highway there is congestion due to high volume of traffic, it makes the trip to be long. The place is often jammed at the toll gate. One way of some of the alternatives on the information highway is to utilize microcontroller technology and Short Message Service (SMS) using a modem GSM (GSM). The result is a wavelength determined by a mathematical equation where s is the distance in meters, v is the speed of sound is 340 m / sec and t is the travel time in seconds and obtain the maximum wavelength of 2550 and a inimum of 170. The mean number - average vehicle measured from three different conditions greatest value is bada time during the day with an average number of 3.9 and the accuracy of the smallest in the afternoon with an average amount of accuracy by 2, Testing interfacing and customer information is grouped into 3 jammed < 6, are < 10 and smoothly > 10 the number of vehicles.

Kata kunci— Microcontr oller, Short Message Service, Global System for Mobile Communications