Police closed a road in Peterborough after being called to concerns for a person holding a knife.
Units were called to Lawson Avenue in Stanground at 2.40pm this afternoon.
Officers cordoned off the road with buses not serving the Lawson Avenue stop.
The woman was sat in the road but has now been arrested.
A police spokeswoman said: “The knife has been seized and the woman has been arrested for possession of a bladed article and has been taken to hospital.”