The busy road's being made two lanes in both directions between Segensworth and Titchfield - it's due to take 18 months.
Complains About Seafront Toilets
Efforts to make sure seaside toilets are clean and tidy are being stepped up by Bournemouth Council.
Heart's been told cleaners are doing more visits in Boscombe after complaints about broken doors and overflowing bins.
It's been blamed on more people using facilities during the hot weather.
Andrew Brown, Operations Manager, said:
“The toilets along the seafront receive regular attention from our team but we acknowledge that during the recent period of hot weather the beach has become busier and the toilets used more.
"To combat this we have increased the number of visits to toilets along the seafront by our dedicated Boscombe cleaning team. We take any complaints about the cleanliness of our toilets seriously and we continue to make them a priority.”
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