What information is commonly reported to estimate how long it will take for someone to arrive at a destination?

The estimated time of arrival, often abbreviated as ETA, is the most effective measure for determining when someone is expected to reach their destination. It takes into account various factors such as current traveling speed, distance to the destination, and potential delays due to traffic or road conditions. This information provides a clear snapshot of when one can anticipate a person's arrival, making it a key piece of information in navigation and scheduling.

While current location is useful for starting point identification and travel time provides insight into how long the journey might take, it is the estimated time of arrival that directly communicates the anticipated completion of the trip. Departure time indicates when a journey begins but does not offer insights into the progress towards the destination. Thus, ETA is pivotal for planning and coordination.