GPS systems are primarily used to track and measure vehicle speed and movements for travel time surveys, however they are also used to identify data collection points. Data is collected every second allowing for detailed analysis for travel time routes. Matrix also has the capability to add delay codes to the GPS data allowing clients to access another level of information. Delay codes specific to your traffic / transport study can be incorporated. GPS technology can be applied to both private vehicle and public trasport surveys. Video GPS units can be deplayed to collect both video and GPS data.