Troopers never enforce it however. A broken white line on a two lane highway means it's OK to pass slow moving cars on the left if the coast is clear in-front of you. Source(s): Alignment, suspension and brake shop. In Europe, it means you may overtake, but with caution. A soild line means to not cross over.
Best Answer: There have been 6 manned Moon missions, between 1969 and 1972. I'm assuming you mean manned trips to the Moon. All of those were conducted by the US, from 1968 through 1972; 9 missions in all. Apollo 8 was the first time man visited the Moon, in December 1968 right at Christmas time. It was famous for the reading from Genesis on Christmas Day.
There were 5 unmanned missions following the ill-fated Apollo 1 disaster. After that, there were 2 earth orbital missions (Apollo 7 & Apollo 9), and 9 lunar missions (Apol â¦ lo 8, 10, 11, 12, 13, 14, 15, 16, and 17). There were 3 long duration earth orbital missions after Apollo 17 that used the Apollo hardware and spacecraft. Skylab 1 was the workshop itself where the astronauts lived for months at a time. Skylab 2 lasted 28 days, Skylab 3 lasted 56 days and Skylab 4 lasted 84 days in space.