Eastern Harbour Crossing
In 1984, the government decided to build a second railway tunnel and a second road tunnel to alleviate traffic congestion in the Cross-Harbour Tunnel resulting in Eastern Harbour Crossing, the first railway-road tunnel in Hong Kong. The tunnel enabled Kwun Tong line's extension to Quarry Bay, with an additional stop, Lam Tin, built in the middle. The new MTR station, opened on 8 November 1989, caused an influx of population into Lam Tin.