IPA: /ˈtoʊlˌhaʊs/
KK: /ˈtoʊlˌhaʊs/
A building next to a tollgate where a person collects fees from travelers using a road or bridge.
The tollhouse was busy as many cars stopped to pay their fees.
Tollhouse is formed from "toll" (from Old English *toll*, meaning a payment or fee) and "house" (from Old English *hus*, meaning a dwelling or shelter). A tollhouse is a building where payments or fees are collected, typically for the use of a road or bridge.
Think of a 'payment' ('toll') being collected at a 'shelter' ('house') — that's what a tollhouse is, a place where you pay to use a road.