Slow zone

In the United States, a slow zone is an area where a train is forced to slow down for either structural, construction, power, signal, or track problems. Slow zones limit a train to about 10 to 35 miles per hour (16 to 56 km/h). Notification to train crews is referred to as a "slow order."

In the United Kingdom this is called a speed restriction.

See also

• Rail speed limits in the United States
• Slow zones on the Chicago L