Stating that 15,000-km of cement concrete (CC) roads were laid in the State in the last three years, R&B Minister Ch. Ayyanna Patrudu on Saturday said the government was keen on improving road infrastructure. Addressing a public meeting at Rangampeta after inaugurating the Kotapadu-Venkatapuram and Subhadrapeta-Mukundavaram-Eelakolanu roads along with Rajamahendravaram MP M. Murali Mohan, he said the government was keen on fulfilling all the promises made during the elections.