Due to the usage of our data feeds for various 3rd party applications such as TV graphics or live dashboards we were asked to add parameters in the */current API. Two new parameters:

• eta - Estimated time of arrival is the duration to reach the finish. The prediction is based on the measured speed.
• gap - Is the duration to reach the current location of the leader. The prediction is based on the measured speed. 

Our documentation provides all information and samples about our data feed:  https://docs.racemap.com/data-api/current