eta

ETA is spatiotemporal regression served in real time over conditions that shift by the minute. The signal is feature freshness, segment or stage decomposition, and the asymmetric cost of being wrong. Here is the design.

An ETA is a promise. The interview tests whether you model it as a point estimate (and apologize when it misses) or as a distribution where p90 lets you under-promise, and how you feed live traffic and completed trips back into the model.