Police are asking motorists to take care on the roads during rush hour.
There are difficult driving conditions in many places across the force, particularly in parts of Northumberland, and officers are continuing to monitor weather and traffic conditions.
Currently, the A68 north of Stagshaw roundabout to Carter Bar and the A696 from Belsay to the A68 are major routes affected by the weather but several smaller routes are also affected.
Access to and from Rothbury is still proving difficult and officers are out and about in the community to reassure people that all is being done to improve access. Anyone with concerns should speak with local officers.
In other areas of the force, officers are reminding motorists to take care in the evening rush hour.
Chief Superintendent Gary Calvert said: “Snow has fallen throughout this morning and into the afternoon, on top of already existing snow and ice, and there is forecast for further adverse weather to come.
“This is causing some disruption across the force, particularly in areas of Northumberland, and we’d urge people to only travel if absolutely necessary.
“For those leaving work or travelling home this afternoon, we’d advise people to take extra care during this evening’s rush hour.
“We expect rush hour to be a little slower than usual due to the weather. I’d like people to think in advance about their journey home and consider whether it might be appropriate to set off a little early to avoid any rush hour problems.
“Before setting off for home, clear snow and ice from windows and headlights. Drivers should moderate their speed to match the conditions and be aware that stopping distances are longer on wet or icy roads and drivers should maintain a safe distance from other road users.
“Motorists also need to keep a look out for pedestrians who may be walking on the road to avoid icy pavements.
“We will continue to monitor weather forecasts and conditions across the force and will have officers out and about on the roads and in our communities overnight. I would ask everyone to remain alert and drive with care and consideration.”