The CCL station, which is a Civil Defence (CD) shelter, features The Cartography Of Memories by Hazel Lim.

[12][13] On 15 August 2014, the Land Transport Authority (LTA) announced that TSL would merge with the ERL to form the TEL.

[18] Due to the mixed ground conditions of soil and rock and the presence of groundwater, the TEL tunnels at Caldecott station were mined instead of the cut-and-cover method.

This construction method also minimised disruption to a service road connecting to St. Joseph's Institution International school.

[19] On 14 December 2020, it was announced that the opening of TEL 2 was delayed to the third quarter of 2021 so the rail system software for the line could be reviewed.

[24] Prior to opening of phase 3 of TEL, trains turnaround by using the cripple siding on the south end of the station.

It is also close to community and health-related centres such as the Assisi Hospice, Mount Alvernia Hospital, Orange Valley Nursing Home and the Singapore Association of the Visually Handicapped (SAVH).

This included greater colour contrasts at the station platforms and illuminated staircase handrails to enhance visibility.

The artwork depicts a cartographic map of the Thomson area, where the station is located, using written recollections from some 100 local residents and friends recalling their memorable experiences in Singapore.

[40][41] Originally, Lim proposed a collage of pictures depicting the station's surroundings, seen through frames such as grilles on a bridge or through a window.

However, the Art Review Panel, in charge of the AiT programme, was not impressed with this idea, due to its lack of effectiveness on the vertical lift shaft.

[43] After collecting the various responses from friends, relatives and LTA staff, Lim selected 40 unique recollections for the work.

Through this work, the artist addressed the notions of displacement and the creation of histories, maps and landscapes especially those linked to Singapore.

[44] Claire Lim's artwork :)(:, a series of dot patterns that form smiley faces, is shown on the TEL platforms.