... for the thirtiethpeak hour traffic levels for the year 2003 (given in various categories of road vehicles). The traffic throughput figures inone direction for tourist and freight traffic aregiven in Table 1. The possibility of extending the installationas the traffic increases to saturationpoint was taken Location...

... for intermediate shafts for non-operational purposes could not alwaysbe located ideallydue to existing surfacedevelopment. It became necessary to identify a corridor toprovide flexibility. in alignment and toallow for the manyconstraints that had tboe satisfied. 4. The form of the corridorrecognized engineering...

... if a shaft completed andcommissionedin 1984, was taken outof service for maintenance. two years ahead of programme and 4. Most shaft locations were chosen to suit within the S250 million budget.This the best combinationof the following factors: Paper describesthe design of shafts, proximity to trunk mains...