This building determines how many tracks you can lay on the map. Tracks must be laid to connect goods facilities and other cities.
When you start a round the level this building starts at varies depending upon the Era:
Era 1: 1
Era 2: 4
Era 3: 6
Era 4: 8
Era 5: 10
Era 6: 12
On x2 speed worlds the upgrade time is reduced to 50% and on x4 worlds to 25%.
Level 1: Track limit 4
Level 2: Upgrade Cost $5,000, Upgrade Time 00:00:10, Prestige 2, Track limit 6
Level 3: Upgrade Cost $60,000, Upgrade Time 00:20:00, Prestige 5, Track limit 8
Level 4: Upgrade Cost $150,000, Upgrade Time 00:40:00, Prestige 10, Track limit 10
Level 5: Upgrade Cost $275,000, Upgrade Time 01:00:00, Prestige 15, Track limit 12
Level 6: Upgrade Cost $450,000, Upgrade Time 01:30:00, Prestige 20, Track limit 15
Level 7: Upgrade Cost $650,000, Upgrade Time 02:00:00, Prestige 25, Track limit 18
Level 8: Upgrade Cost $950,000, Upgrade Time 03:00:00, Prestige 30, Track limit 22
Level 9: Upgrade Cost $1,300,000, Upgrade Time 03:30:00, Prestige 35, Track limit 27
Level 10: Upgrade Cost $1,750,000, Upgrade Time 04:00:00, Prestige 40, Track limit 33
Level 11: Upgrade Cost $2,300,000, Upgrade Time 04:30:00, Prestige 45, Track limit 40
Level 12: Upgrade Cost $2,750,000, Upgrade Time 05:00:00, Prestige 50, Track limit 50
Level 13: Upgrade Cost $3,300,000, Upgrade Time 05:30:00, Prestige 60, Track limit 60
Level 14: Upgrade Cost $3,800,000, Upgrade Time 06:00:00, Prestige 70, Track limit 70
Level 15: Upgrade Cost $4,400,000, Upgrade Time 06:00:00, Prestige 80, Track limit 80
Level 16: Upgrade Cost $5,000,000, Upgrade Time 06:00:00, Prestige 90, Track limit 90
Level 17: Upgrade Cost $5,800,000, Upgrade Time 06:00:00, Prestige 100, Track limit 100
Level 18: Upgrade Cost $6,600,000, Upgrade Time 06:00:00, Prestige 110, Track limit 120
Level 19: Upgrade Cost $7,400,000, Upgrade Time 06:00:00, Prestige 120, Track limit 140
Level 20: Upgrade Cost $8,200,000, Upgrade Time 06:00:00, Prestige 130, Track limit 160
Level 21: Upgrade Cost $9,000,000, Upgrade Time 06:00:00, Prestige 140, Track limit 180
Level 22: Upgrade Cost $9,800,000, Upgrade Time 06:00:00, Prestige 150, Track limit 200
Level 23: Upgrade Cost $10,600,000, Upgrade Time 06:00:00, Prestige 160, Track limit 240
Level 24: Upgrade Cost $11,400,000, Upgrade Time 06:00:00, Prestige 180, Track limit 280
Level 25: Upgrade Cost $12,000,000, Upgrade Time 06:00:00, Prestige 200, Track limit 320
Level 26: Upgrade Cost $12,500,000, Upgrade Time 06:00:00, Prestige 225, Track limit 360
Level 27: Upgrade Cost $13,000,000, Upgrade Time 06:00:00, Prestige 250, Track limit 400
Level 28: Upgrade Cost $13,500,000, Upgrade Time 06:00:00, Prestige 300, Track limit 500
Level 29: Upgrade Cost $14,000,000, Upgrade Time 06:00:00, Prestige 375, Track limit 650
Level 30: Upgrade Cost $15,000,000, Upgrade Time 06:00:00, Prestige 450, Track limit 900
