There are many ways to get to Sunnivue; here are two:
1) Take Gainsborough/Nairn Rd. (County Rd. 17) through Hyde Park and Lobo all the way to County Rd. 19 (Petty St.) at Nairn. Turn right and continue to New Ontario Rd., turn left and drive about 1 km. to Sunnivue (if you go over the bridge you have gone too far).
2) Take Richmond St. to Elginfield and turn left on Route 7. Continue to Ailsa Craig and turn left in the middle of town on Queen (which becomes Petty St.) Turn right on New Ontario Rd. a short distance outside of town and drive about 1 km. to Sunnivue on the left.