21. And full-time four-wheel-drive adds a safety margin to everyday driving, especially on wet pavement. 22. This safety margin depends on the accuracy of the odometry system in the train. 23. In that way, the safety margin is even larger than. 24. Meanwhile, the space shuttles have flown intermittently, raising concerns that safety margins are eroding. 25. They have wisely opted for a prolonged protest, yet staying within the safety margin . 26. As a result, safety margins for radioactive materials inside the Windscale reactor were eroded. 27. These include considerations for safety margins during landing and takeoff. 28. Safety margins at the time were also far below anything that would be acceptable today.29. Ford officials acknowledged in September that this meant a safety margin of only 7 mph. 30. It is, therefore, prudent to have a safety margin .
