Complex sentence: Route 73 also serves Oxford Street and Tottenham Court Road (Northbound Only) which are both important shopping street destinations, and the N1 Centre on Upper Street, which is a small shopping centre housing high street brands.
Split into simpler sentences: Route 73 also runs down to Oxford Street and Tottenham Court Road (Northbound Only) which are both great shopping street destinations. Also the N1 Centre on Upper Street is a small shopping centre housing high street brands.