Republic, one of the busiest general-aviation airports in the country, serves, unbeknown to most residents as a reliever airport to relieve passenger congestion from nearby La Guardia and Kennedy Airports.

Local political groups have been keen to see the station reopened in order to reduce passenger congestion at King's Cross St Pancras and to encourage development in the surrounding community.

ONCF stated in 2005 that the refurbishment and upgrading of Casa-Oasis to inter-city standards was intended to relieve passenger congestion at Casa-Voyageurs station.

On 1 September 2012, the airport began a $10 million modernisation program, moving the security checkpoints and enlarging the ticket counters to lower passenger congestion.

Railway operators gradually increased capacity over the next few days, until running at approximately 80% capacity by 17 March and relieving the worst of the passenger congestion.

Trains run less frequently and move more slowly, sometimes creating maddening delays and passenger congestion.

Opposition centres around passenger congestion at Euston, the impact on Camden and NW London Suburbs, the Chilterns AONB, which UK cities should be served, the environmental consequences and the economic viability of the scheme.

The station was built to alleviate surface traffic jams and passenger congestion at Kowloon Tong Station.

The Lok Ma Chau Spur Line is the second railway link between Hong Kong and Mainland China, relieving passenger congestion at Lo Wu Station.

The two-level design reduces passenger congestion by separating arriving and departing passengers.