Terwillegar Drive begins at Whitemud Drive where Whitemud Drive turns from an east - west to north - south orientation as it approaches the North Saskatchewan River .
Is accessible via a modified trumpet interchange with left exit ramps .
Terwillegar Drive begins at Whitemud Drive where Whitemud Drive turns from an east - west to north - south orientation as it approaches the North Saskatchewan River , and is accessible via a modified trumpet interchange with left exit ramps .