IMPROVEMENTS to the streets of Lan Kwai Fong are underway in a bid to prevent a repeat of the New Year tragedy which left 21 people dead. The $90,000 upgrading of D'Aguilar Street, which will be finished mid-April, was inspected yesterday by the Transport Department's chief engineer, Mr William Liew Kwok-sham, and his Highways Department counterpart, Mr Yeung Fat-hang. The engineers recommended three main ways in which Lan Kwai Fong's street conditions could be improved at the public hearings into the tragedy conducted by Mr Justice Bokhary. Ten workmen are now implementing the recommendations - installing railings where there is a large gap between the footpath and road, building steps where the pavement incline is steep and levelling pavement and road surfaces using the same brick paving as is now on the roadway. Mr Yeung revealed the D'Aguilar Street upgrading had been noted as necessary before the tragic accident, but work had not gone ahead because ''in terms of priority, we had too much work on our hands''. However, he thought the roadworks would not have changed the events of December 31 ''to any appreciable extent''.