The proposal is to install two bollards on the corner of Hemingford Road in order to prevent cars from mounting the pavement. The pavement here (as with much of Mill Road) is not that wide. A build out was considered but it was felt that this would create pinch point of cyclists.

(Scheme 16, page 29)

http://www.cambridge.gov.uk/democracy/documents/s13016/Appendix%20B%20-%20Details%20of%20Proposed%20Schemes.pdf