TfL is short for Transport for London, the government body that runs public transport in London — the Underground (the Tube), the buses, the Overground, the Docklands Light Railway, the trams, and the Elizabeth line. It also looks after the main roads, the traffic lights, the cycle hire bikes and the congestion charge, so it is bigger than just trains.

TfL is short for Transport for LondonTfL 是 Transport for London 的縮寫，the government body that runs public transport in London也就是負責倫敦大眾運輸的政府機構——the Underground (the Tube), the buses, the Overground, the Docklands Light Railway, the trams, and the Elizabeth line地鐵（the Tube）、公車、Overground（地上鐵）、Docklands Light Railway（碼頭區輕軌）、電車，還有 Elizabeth line。It also looks after the main roads, the traffic lights, the cycle hire bikes and the congestion charge它也管理主要道路、紅綠燈、公共租借腳踏車和塞車費，so it is bigger than just trains所以它管的不只是火車而已。

In everyday use you will hear it in sentences like 'TfL announced a strike' or 'check the TfL website'.

In everyday use日常使用時 you will hear it in sentences like你會聽到這種句子 'TfL announced a strike''TfL announced a strike'（TfL 宣布罷工），or 'check the TfL website'或 'check the TfL website'（去查 TfL 網站）。

Notice the spelling: capital T, small f, capital L. That small f is deliberate, because it stands for the little word 'for', and TfL is fussy about it in its own writing, though newspapers sometimes print TFL anyway.

Notice the spelling要注意拼法：capital T, small f, capital L大寫T、小寫f、大寫L。That small f is deliberate那個小寫的 f 是故意的，because it stands for the little word 'for'因為它代表的是小小的介系詞 'for'，and TfL is fussy about it in its own writingTfL 自己寫的時候很堅持這一點，though newspapers sometimes print TFL anyway不過報紙有時候還是會印成 TFL。

Grammatically it is usually treated as one thing — 'TfL is raising fares' — but British English sometimes treats organisations as plural, so 'TfL are raising fares' also turns up in speech.

Grammatically it is usually treated as one thing文法上它通常被當成單一個體——'TfL is raising fares''TfL is raising fares'——but British English sometimes treats organisations as plural但英式英文有時候會把機構當複數看，so 'TfL are raising fares' also turns up in speech所以口語裡也會出現 'TfL are raising fares'。

The word is really only useful in Britain; outside London, few people would know it.

The word is really only useful in Britain這個字其實只有在英國有用；outside London, few people would know it出了倫敦，很少人會知道它。