There are two round-trip bicycle lanes with a total length of 3.6 kilometers and 3.7 kilometers on the west side of the sea line railway in Dadu District. The 3.7-kilometer Longjing Dapai Lane was rebuilt using the water ditches on both sides of the Longjing Dapai, starting from the township office. From the Longzhong Bridge to the Longjin Bridge in the west of Longjin Village, it was originally set up to allow nearby students to reach the school safely during school and to return home safely after school. Nowadays, the bicycle lanes also allow nearby people to Cycling as a leisure sport is environmentally friendly and economical.
The Longjing large row of bicycle lanes have beautiful scenery along the road. The pavilions are located on the lanes for people to relax. Each has different characteristics. There are special-shaped street lights along the way to make the scenery more beautiful. And riding on the bicycle lane is also greeted by the broad sea. It is refreshing to see the endless sea. However, because of the sea, tourists need to pay more attention to the weather of the day to avoid the sea breeze that is too inconvenient to drive. Also recommended is the Dadu Creek near the driveway, there is a good spot for bird watching, and there are different species of birds staying throughout the year, no matter what season you come, you can enjoy the beautiful pictures with their own characteristics. Nowadays, pedestrian landscape trails have been set up on the embankment. On holidays, you can see many people walking and exercising here. The vast landscape in front of you is accompanied by the breeze and the laughter of children. The stress-free atmosphere makes people feel very physically and mentally. Relax.
大肚區海線鐵路西側有兩條約三點六公里和三點七公里的來回自行車道，其中全長3.7公里的龍井大排車道是利用龍井大排兩側水溝改建而成，起點為鄉公所的龍中橋，一直到西邊的龍津村之龍津橋，一開始設立目的是為了讓附近學生能在上學時平安抵達學校，放學能安全回家，現今藉由自行車道，也讓附近民眾可以將單車騎乘當做休閒運動，環保又經濟實惠。
龍井大排自行車專用道，沿路風景優美，座落在車道上供人休憩的涼亭，每座特色皆不相同，沿途還有特殊造型的路燈，將眼前的風景妝點得更加美麗。而騎在單車道上映入眼簾的還有寬廣的海面，一眼望去無邊無際的大海讓人心曠神怡，不過也因為靠海，遊客們需多注意當日天氣，以免海風太大行車不便。另外要推薦的是車道附近靠大肚溪處，有一處賞鳥的好景點，且一年四季都會有不同品種的鳥停留，不管在什麼季節前來都能欣賞到各具特色的美麗畫面。現在堤防上還設立了人行景觀步道，到了假日可以看到許多民眾在此地散步、運動，眼前遼闊的風景伴隨著微風輕拂以及孩童的嘻笑聲，毫無壓力的氛圍讓人身心都感到無比放鬆。