other NEL stations, the station itself is not designated as a Civil Defence shelter; an underground car park underneath the ten-storey tower is a designated shelter instead. As a result, the station is more spacious and is naturally illuminated with lightwells. The station architecture received an "honourable mention" at the Singapore Institute of Architects Design Awards in 2003. The station is wheelchair accessible. The NSL station, initially without accessible facilities, has been upgraded to include lifts, ramps and dedicated toilets for the disabled. A tactile system, consisting of tiles with rounded or elongated raised studs, guides visually impaired commuters through the station, with dedicated routes that connect the station entrances to the platforms or between the lines. There are wider fare gates that allow easier access for wheelchair users into the station. Public art The mobile sculpture Lantern of Music by Tan Ping Chiang is suspended from the ceiling in the NSL concourse. Intended to depict Singapore's multiracial culture, the sculpture resembles three lanterns. The largest "lantern" portrays the traditional and contemporary musical instruments of Singapore's different ethnic groups, while the two smaller lanterns portray the dances of these ethnic groups and opera masks. At the NEL and CCL platforms, four other artworks are displayed as part of the MRT network Art-in-Transit programme, a showcase that integrates public artwork in the MRT network. Interchange Milenko and Delia Prvacki's artwork Interchange is displayed across the linkway between the NSL and NEL portions of the interchange. Featured on the walls, columns and the floor, including the floor mosaic at the foot of the escalators and ceramic works on four pillars, the artwork is a combination of Delia's ceramic works with Milenko's earthy mosaics. Seeking to reflect the ethnic‑cultural diversity of Singapore and the region, the Prvackis integrated various local and regional cultural elements such as batik, Peranakan clothing and Chinese ceramics. The station's role as an interchange between the lines, its layout and the cultural history of Singapore inspired the artwork, which was the first major collaborative work between the couple. The artists fused these elements to create modern art "expressed in a marriage of languages" while remaining sensitive to tradition and environment. Delia's ceramics were inspired by Chinese ceramics which she was fascinated by since her first introduction to them by a teacher 30 years ago. In this work, she took the opportunity to renew her passion. Milenko's mosaics are closely