The authorities managing Sungai Besi Expressway and New Pantai Expressway have announced temporary road closures spanning from 11 pm on August 1 through 10 am on August 2 to accommodate the IJM Allianz Duo Highway Challenge 2026, a major running event that will utilise sections of both major arterial roads in the Kuala Lumpur metropolitan region.

The NPE closures will affect two distinct stretches of the expressway. The first segment runs from KM1.8 at Bulatan Kewajipan in Subang Jaya extending to KM11 towards Bangsar, with both directions of travel impacted. Additionally, traffic will be halted from the Kuchai Lama intersection at KM17 through to the Pantai Dalam Toll Plaza, again affecting vehicles travelling in both directions. These sections represent critical corridors for commuters and commercial traffic moving between the Klang Valley's western suburbs and central areas.

On BESRAYA, the disruption encompasses the route from Kuchai Lama intersection to Jalan Pandan 1 at KM21.9, with the closure continuing towards Jalan Lingkaran Tengah 2, also affecting both directions of travel. This portion of the expressway typically handles substantial traffic volumes from the southern suburbs heading towards the city centre and the ring road network. The timing of the overnight closure represents an attempt to minimise disruption during peak commuting hours, though late-night and early-morning travellers will still encounter significant obstacles.

Chua Lay Hoon, chief executive officer for both BESRAYA and NPE, confirmed that the temporary closures have received formal approval from multiple government and law enforcement agencies, including the Ministry of Works, the Royal Malaysia Police, and the Malaysian Highway Authority. This multi-agency clearance underscores the scale of the event and the coordination required to safely manage such large-scale activities on critical infrastructure. The administrative process reflects Malaysia's established protocols for managing major events that require temporary restrictions on major transportation corridors.

Highway users are being strongly advised to plan their journeys well in advance of the event date and to identify suitable alternative routes to bypass the affected sections. For those unable to reroute, arriving at their destinations before 11 pm or after 10 am would allow them to avoid the closure window entirely. The timing of the event, spanning the night and early morning, suggests the running challenge will involve participants covering the expressway routes during hours when traffic volumes are typically lower, reducing overall disruption compared to daytime closures.

A comprehensive traffic management operation will be deployed throughout the event period. Chua stated that traffic management officers, Royal Malaysia Police personnel, and technical support teams will be positioned at strategic locations along the affected routes. Their responsibilities will include ensuring the safety of the running event participants while actively managing traffic flow for vehicles that may still need to navigate nearby areas and access adjacent routes. This dual-purpose approach reflects the need to balance event execution with the critical function of maintaining urban mobility.

Detailed information concerning viable alternative routes will be disseminated through the official social media channels operated by both BESRAYA and NPE, ensuring that the widest possible audience receives timely guidance on navigation options. In an era when digital communication platforms provide real-time information, this approach enables motorists to access practical transportation advice efficiently. Drivers are encouraged to monitor these channels in the days preceding August 2 to plan their alternative journeys properly.

The event itself represents a collaborative initiative bringing together multiple prominent organisations in Malaysia's corporate and financial sectors. BESRAYA (M) Sdn Bhd and New Pantai Expressway Sdn Bhd, which operates as a subsidiary of IJM Corporation Berhad, are jointly organising the challenge alongside Allianz Malaysia Berhad. This partnership reflects how Malaysian companies increasingly leverage major roadways and urban infrastructure to host branded sporting events, transforming transportation corridors into venues for community engagement and brand visibility.

Prospective participants and event attendees have been specifically encouraged to plan their travel arrangements with generous time margins and to arrive early on the event day, suggesting that participant logistics and ingress to the starting areas may require additional preparation time beyond typical event attendance. The organisers appear cognisant that the unusual venue—a major expressway system—presents distinctive challenges for managing participant flow and ensuring adequate safety protocols.

For ongoing updates and comprehensive information about the IJM Allianz Duo Highway Challenge Run, the event's official presence on social media platforms Instagram (@ijm_highway_run) and Facebook (IJM Allianz DUO Highway Challenge Run) will serve as primary information sources. These digital channels will likely provide real-time updates during the event period itself, allowing both participants and affected motorists to remain informed about conditions and developments as they unfold.

The closure represents a notable example of how major urban thoroughfares in the Klang Valley must occasionally be repurposed for large-scale events, reflecting the multifaceted demands placed on critical transportation infrastructure in Malaysia's most densely populated region. While the temporary disruption will inevitably inconvenience some motorists, the overnight timing and advance notice period provide reasonable opportunity for journey planning and rerouting decisions.