Some houses were built to reduce symptoms for people with asthma.

All rail infrastructure was built in copper to reduce the risk of sparks.

A tunnel was built to reduce the visual impact of a road cutting.

The canal was built in the mid-19th century to reduce flooding.

A new flyover has been built in front of station to reduce traffic congestion.

Sub-layers may be built within each layer to reduce complexity.

Two-thirds of them were built as narrow gauge lines to reduce costs.

Recently a city bypass has been built to reduce the traffic congestion in the town.

These were built to reduce the length around the longest of ravines.

The arena was built to reduce echoing, a common problem among London music venues.