The Land Transport Authority (LTA) has awarded a contract for the expansion of the KPE/TPE interchange at the north end of the expressway and construction of a new road connection to Punggol Central, providing a new and more direct link to and from the KPE and TPE, and alleviating the traffic congestion of the TPE between the current KPE ramps and Punggol ramps.

[8] On 27 July 2007, the LTA announced the opening of the southern ECP-PIE section of the expressway (Phase 1) to traffic on 26 October that year.

[10] The Kallang section of the expressway starts from eastern end of the Marina Coastal Expressway, where it also interchanges with the East Coast Parkway near the fourteen-kilometre mark of the ECP in a northward direction, goes underground below the Geylang River, cuts across the Kallang Sports Complex to the west of the National Stadium, comes to an interchange at the Mountbatten Road/Nicoll Highway/Guillemard Road junction, crosses the East West MRT line, before ending with an interchange with the Pan Island Expressway at the thirteen-kilometre mark of the latter.

On 27 July 2007, the LTA announced an extension of the KPE from East Coast Parkway to the Ayer Rajah Expressway via Marina South.

British firm Bartle Bogle Hegarty (BBH) has been appointed to publicise safety messages needed to prepare users for the KPE.

BBH, which in turn appointed British public relations firm Grayling, clinched the contract for S$2.81 million.

Its campaign started in the second quarter of 2007, consisting of a website and an album Sounds of the Underground of ten songs for the purpose.

There have been no instances of speed cameras flashes indicating a violating vehicle exceeding the limit, as the luminosity in the tunnel does not require additional light source.