Customers using our */current API to feed TV graphics with real-time location data asked for gap values in relation to a specific reference device. Advantage: The reference device can be selected and flexibly changed during a running event. 

So we developed the new gapAverage parameter. gapAverage provides the duration in seconds to reach the current location of the reference device. The prediction is calculated with the average speed of the reference device on the leg between its current location to another device.

• The gapAverage value can be calculated only for devices behind the reference device.
• gapAverage fluctuates less than gap calculated with small values of currentSpeedDuration query.

Read all about the */current data feed and find many samples to test your APIs in our documentation: https://docs.racemap.com/data-api/current#optional-query-parameters