Highway 3 is set to be closed near the Hämeenlinna tunnel during the night hours from Wednesday to Friday, starting at 9 PM and ending at 6 AM. This closure will affect traffic in both southern and northern directions, as reported by the Central Finland Vitality Center. The closure is necessary for maintenance work, which includes the renewal of fire safety equipment in the tunnel, ensuring that all systems are operational and compliant with safety regulations.

During these maintenance periods, specific tunnels will be closed on different nights; the northern tunnel will be closed on the night between Wednesday and Thursday, and both tunnel passages will be closed on the following night. Traffic will be diverted to secondary routes, with alternate routes indicated: southbound traffic will be redirected via Eureninkatu and northbound traffic via Kaivokatu. This measure aims to minimize disruption and ensure that motorists can navigate safely around the construction site.

It is important to note that the tunnel closure is subject to weather conditions, and there is a possibility that it could be canceled or postponed with little notice due to adverse weather. This proactive approach highlights the importance of maintenance schedules and the need for extensive safety checks within tunnel infrastructures to ensure the safety of drivers in the area.