Fixed speed cameras are to be installed on a section of the A14 during roadworks to enforce a 40mph limit.
Police are warning drivers that speed limits will be strictly enforced on a section near Ipswich from next week to ensure the safety of workers.
Michelle Finnerty from Suffolk SafeCam said the measure is only temporary but is likely to last about 15 weeks.
"The roadworks are on the Barham to Nacton stretch of the A14 at Ipswich and fixed cameras will be installed."
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