How do you track shifting freight preferences when carriers keep changing?

We ran into this exact problem last quarter — traditional quarterly surveys were basically stale by the time we fielded them. Switched to a rolling panel of about 150 shippers with monthly pulse checks (5-6 questions max) and layered in spot rate data from FreightWaves to cross-validate what people *said* vs. what they *did*. The behavioral data honestly tells you more than the stated preferences when the market's moving this fast.