Travel time studies are used to document congestion and measure the efficiency of a highway. In the past, the conventional method of measuring travel time and delay was employed using the stopwatch. This system is quite effective provided that the driver and the passenger(s) work conscientiously. Otherwise, data may vary widely resulting to a lower accuracy. Odometer devices may also help, but it must first be initialized and calibrated. Although this method was widely accepted, major issues regarding its accuracy and convenience has arisen. With the Global Positioning Systems (GPS) and Geographical Information Systems (GIS), time travel measurement has become easier and more efficient. The system is accurate and efficient because the surveyor need not to record the time elapsed, and test vehicle location can be traced through a GPS device. The Geographical Information Systems meanwhile makes it easier to interpret and analyze GPS raw data through its digital maps.