這裡的picked-up是什麼意思?

The National Freeway Bureau says traffic picked-up yesterday - with congestion being reported on several of the island's main highways. However, the freeway bureau says travel time between Taipei and Kaohsiung remained at than five-and-a-half hours in both directions. Traffic volume reached an... 顯示更多 The National Freeway Bureau says traffic picked-up yesterday - with
congestion being reported on several of the island's main highways.

However, the freeway bureau says travel time between Taipei and Kaohsiung
remained at than five-and-a-half hours in both directions.

Traffic volume reached an estimated 2.9 million vehicles yesterday.

The freeway bureau says traffic will pick-up from today through Sunday, with
over 3-million vehicles forecast to be using the freeways tomrrow.

上面這則交通新聞,看了沒全懂,想請大師幫忙翻譯一下
另外,這裡出現兩次的pick-up該作何解?
還有,第2段裡的...remained at than five-and-a-half hours...
這裡的than是什麼意思?怎麼會這麼用?
更新: 感謝 羅莉知識長,您說的有道理
但如果以實際情況而論,由另一個觀點來看
交通擁塞通常的確是漸漸形成,而非突然塞爆
所以我比較支持 prisoner26535 知識長 的解釋翻譯!
4 個解答 4