41. A picnic table and walking track circuit starting from the picnic area passes through the tunnel. 42. Ireland recorded his first international victory on the first stop of the World Cup long-track circuit . 43. The failsafe track circuit remains in widespread use. 44. It is one of the last major oval track circuits to still compete on dirt tracks. 45. The signals and track circuits only activate when the TBTC system has failed, and are normally dark. 46. The locomotives had a wheelbase of only, and this was too short to operate the track circuits . 47. Rawson follows the track circuit around the world annually, not just becoming an expert every four years. 48. Miniature stop lights were to be introduced, and track circuits may also be introduced on the line. 49. Devers was favored for a fourth title because of her domination on the track circuit this summer. 50. But at every stop on the track circuit , Johnson also copes with being " the man to beat ."
