- If you want to move the grid closer to your road network, adjust the grid settings.
- Depending on the scene you could also project roads. Select all roads and use projection tool. Be aware that in this case any elevation is removed from your road, everthing is flat afterwards.
- Use translation tool. Select your roadnetwork, specifiy an offset and translate entire road network by this offset. While the entire scene is close to grid (zero) the local elevation of road is kept.