 The maximum speed for both passenger and freight trains on the "main line" of the Mulberry Island and James River Subdivisions therefore was with the maximum speed on the Industrial Subdivision being .On all subdivisions, the maximum speed through sidings, within yard limits, on spurs and through switches was also .There were more restrictive maximum speeds specified for dead engines (engines not under power while being towed), which were , rail mounted derricks and cranes run between and , and track motor cars travel to about and .