A green lane is an unsurfaced road (at least in the United Kingdom). Some may be open to vehicles, they would probably only be passable in a 4x4 vehicle (SUV), others are designated a bridleway[?].
... out of which 43.6% have children under the age of 18 living with them, 62.2% are married couples living together, 17.0% have a female householder with no husband present, ...