VIJAYAWADA: Union Minister for Road Transport and Highways Nitin Gadkari has promised to spend a minimum Rs 3 lakh crore for the development of road infrastructure in Andhra Pradesh by the end of 2024. Addressing a public meeting after virtually inaugurating and laying the foundation stone for 52 projects worth Rs 21,600 crore at a programme in the city on Thursday, he described AP as one of the progressive States that has to play a key role in the economic development of India.