![](https://pic1.mangapicgallery.com/r/avatar/6d/u110959_50x50.jpg?2)
On the back of a moving truck:
http://www.mangago.me/read-manga/taiyou_to_himitsu_secret_and_sun/mi/mi_chapter-1/
![](https://pic1.mangapicgallery.com/r/avatar/ce/u67569_50x50.jpg?2)
Hmmmm...I don't know you've read this or not but here, "Sex on Train":
http://www.mangago.me/read-manga/sweet_inomoto_rikako/an/sweet-inomoto-rikako--chapter-5.html/12/
![](https://pic1.mangapicgallery.com/r/avatar/fb/u4013_50x50.jpg?2)
You mean like this? o3o I only remember this one.
http://www.mangago.me/read-manga/himitsu_no_kuchizuke/an/himitsu-no-kuchizuke-chapter-3.html/2/
![](https://pic1.mangapicgallery.com/r/avatar/08/u49344_50x50.jpg?2)
My vehicles sex list is exactly what you are looking for http://www.mangago.me/home/mangalist/29085/
Yaoi where the two guys have sex on the train, or in a car? Something along those lines.