. Electric railway journal . N 1901 endanger workmen on the structure, in subways or inyards, who would be justified in assuming that if theywere in the clear of the car body they would be in theclear of other car obstructions. Such a plan would alsoinvolve radical and expensive changes on the elevatedstructure and at stations. The third-rail location on the Boston system wasdeveloped at a time when little or no inverted or cov-ered third-rail was in use and was restricted by theconditions in the Tremont Street subway, temporarilyused for train service. The present wooden guard wasinstituted f
. Electric railway journal . N 1901 endanger workmen on the structure, in subways or inyards, who would be justified in assuming that if theywere in the clear of the car body they would be in theclear of other car obstructions. Such a plan would alsoinvolve radical and expensive changes on the elevatedstructure and at stations. The third-rail location on the Boston system wasdeveloped at a time when little or no inverted or cov-ered third-rail was in use and was restricted by theconditions in the Tremont Street subway, temporarilyused for train service. The present wooden guard wasinstituted for the safety of employees in the belief thatthe third-rail when visible was less dangerous thanwhen hidden. It is impossible to place the third-rail atBoston between the running rails on account of lack ofclearance, and even if clearance existed there would thenbe no opportunity to cover the third-rail. It is alsoimpossible to make contact with the third-rail on theside instead of on top, due to the variation in the lateral. Electric THIRD-RAIL CLEARANCE; PHILADELPHIA RAPID TRANSIT COM-PANYS TOP-SUPPORT DESIGN April 1, 1916] ELECTRIC RAILWAY JOURNAL 653
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