New drone footage shows work is well underway on the Christchurch Southern Motorway – Stage 2 1 September 2017 4:43 pm | NZ Transport Agency A wet winter hasn’t hampered work on the $195 million Christchurch Southern Motorway – Stage 2 (CSM2) project, with more than 300,000 cubic metres of earth moved, two new local roads built and the first of eight bridges almost complete.