Traffic congestion alert system using GSM : The increase in the number of vehicles has led to Traffic congestion. During the busy hours of a day, the traffic is at its peak and there are various problems related to traffic congestion. One such problem is fuel consumption. An average of 90 minutes is spent daily by a vehicle in congested traffic. People forget to switch off the engines which cause wastage of the non renewable resources such as petrol, diesel and LPG. A car wastes 2.5 litres of fuel and two wheelers waste 0.75 litres of fuel in traffic jam per day. The cost of fuel wasted by city car is 7.5 cr and two-wheelers are 2.5 cr per day. The government subsidy on the wasted fuel is 1.5 cr per day. This incurs a heavy revenue loss to the country.