Suffolk County Council are proposing a blanket 20mph zone in this area.

Consultation proposal documents are at:- http://www.suffolk.gov.uk/your-council/decision-making/consultations/consultation-on-whitton-and-castle-hill-20mph-speed-limit-proposal/

Cycle Ipswich response (currently in draft):- https://docs.google.com/document/d/1Itk7qCLrdPB3nV5OPjwbszpG42uACzisIjZtjpfbiQI/edit?usp=sharing