A3 Hindhead Tunnel Closure Causes Major Traffic Disruption Due to Overrunning Works

In-Depth Analysis

## Background The closure of the A3 Hindhead Tunnel on March 26, 2025, stemmed from scheduled overnight maintenance works that extended beyond their planned 6 am finish time. Reports indicated a "technology issue" or an "electrical fault" specifically related to the tunnel's camera system contributed to the delay.

## Affected Routes and Diversions The primary closure affected the A3 between the A333 junction near Hindhead and the A283 junction at Milford. This section is a critical part of the A3, a major artery connecting London and Portsmouth.

National Highways established signed diversion routes: * **Northbound:** Drivers were directed to follow the 'solid diamond' symbol from the Longmoor exit, using the A325 towards Farnham, then the A31 towards Guildford to rejoin the A3. * **Southbound:** Drivers were advised to follow the 'solid triangle' symbol, exiting at the Stag Hill interchange (Hogs Back) onto the A31 towards Farnham, continuing to the A325, and following that back to the Longmoor interchange to rejoin the A3.

## Impact on Traffic and Local Areas The sudden closure during rush hour led to substantial traffic congestion on the A3 approaches and gridlock on local roads in surrounding villages like Haslemere and Thursley, as drivers sought alternative routes. Thursley Parish Council voiced frustration regarding communication and signage during such incidents.

## Reopening Status National Highways worked to reopen at least one lane in each direction as quickly as possible, but confirmed the closure would persist through the morning peak. The exact reopening time remained uncertain initially.

## How to Prepare * **Check Before Travel:** Always check live traffic updates (e.g., National Highways website, local news, map apps) before starting your journey, especially when using major routes like the A3. * **Know Diversions:** Familiarize yourself with potential diversion routes if you frequently travel through areas prone to closures. * **Allow Extra Time:** If disruption is reported, allow significantly more time for your journey. * **Consider Alternatives:** If possible, delay your travel or consider alternative modes of transport.

## Who This Affects Most * Commuters relying on the A3 for travel between London, Guildford, and Portsmouth. * Commercial drivers and logistics companies. * Local residents in areas surrounding the diversion routes (e.g., Hindhead, Milford, Haslemere, Thursley, Farnham).

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FAQ

Takeaways

• The A3 Hindhead Tunnel closure highlights the potential for significant disruption from unexpected roadwork overruns or technical faults.
• Always check live traffic information before travelling on major routes.
• Be aware of the official diversion routes (Northbound: A325/A31, Southbound: A31/A325) if you need to travel through the area during the closure.
• Expect delays on both the A3 approaches and surrounding local roads.

Discussion

Were you affected by the A3 closure? How much delay did it add to your journey? Let us know!

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