。
We exited the expressway at Junction 11.
Literal
We [topic-は] Junction 11 [at-で] expressway [object-を] exited.
A simple travel sentence. ジャンクション ('junction') in Japanese is specifically a highway interchange, often written JCT on road signs. 高速道路 ('expressway, motorway, freeway') is the standard term for Japan's toll highway system. The verb 出る ('exit') takes を for the place being exited — 出口を出る.