You can achieve this with the Service Area solver with the Lines option. So create a new service area layer, and bring up the properties of the service area layer. On the polygon tab, turn off Generate polygons and then on the Lines tab, turn on Generate Lines. Then on the Analysis tab, choose your impedance as lenght or time and set the break value to 4 km or 10 minutes as needed. Close the properties. Now add you facility and solve. You will get all the lines that can be reached within the specified break value.