The second passage: diameter: 75. 1 circumference: 235.93, total length: 407.85.

Three paths: diameter: 77.6 circumference: 243.79 length: 4 15.75438+0.

Four lanes: diameter: 80. 1 perimeter: 25 1.64 total length: 423.56.

Five lanes: diameter: 82.6; Circumference: 259.50; Length: 43 1.42.

Six lanes: diameter: 85. 1 circumference: 267.35, total length: 439.27.

Seven lanes: diameter: 87.6; circumference: 275.20; length: 447. 12.

Eight lanes: diameter: 90. 1 circumference: 283.06, total length: 454.98.