A plot prepared by Rota Design Limited showing the stress within the subway structure under the defined load case conditions. This finite element analysis plot of the subway provides an assessment and verification of the performance of the design when it is subjected to the forces it will normally be expected to resist when in its service conditions. The most compressive stress occurs within the ribs of the segments and these are the blue areas at the three and nine o'clock positions when the subway is viewed as if you were walking through it. [108]