What geological challenges prompted expressway design changes?

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Geological Challenges Did Not Alter Expressway Contract Value

The Penang government has stated that design modifications to the RM852 million Air Itam–Tun Dr Lim Chong Eu Expressway project did not impact its overall contract value. These revisions were necessitated by technical assessments of challenging site conditions encountered during the project's development.
Removal of Tunnels and Elevated U-Turn

The latest project design saw the removal of two planned tunnels, intended for Changkat Delima and Bukit Gambier, along with an elevated U-turn near The Light Waterfront. Initially, the design incorporated tunnels, approved on November 27, 2020, but subsequent assessments of geological conditions and structural stability during construction led to a reversion to the original open-cut concept for the tunnel sections. This revised open-cut design received state government approval on July 3, 2024.
U-Turn Design Revisions

The proposed elevated U-turn near The Light Waterfront was rejected by the Malaysian Highway Authority (LLM) and PLUS Malaysia Berhad due to insufficient weaving length. A new U-turn design was subsequently proposed and approved near the Penang Bridge interchange, meeting all technical requirements after discussions with LLM and PLUS. These types of design revisions are considered standard practice in design-and-build projects to ensure compliance with technical and safety standards.
Contractor Bears Additional Costs

Any additional costs arising from these design revisions, including factors such as increased construction material prices, are fully borne by the contractor. The project was reported to be 91.8 per cent complete as of June 15, with an adjusted contract value of RM851,970,105. All design revisions were endorsed following professional evaluations by the project's engineering consultants and relevant technical agencies, including the Public Works Department's (JKR) Project Monitoring Team.

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What geological challenges prompted expressway design changes?

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