Katraj (Marathi: कात्रज) is a village near Pune in Maharashtra state of India and within the jurisdiction of Pune Municipal Corporation. The adjacent hill is called Katraj Ghat (mountain pass). Pune-Satara highway, NH4, passes through Katraj Ghat. Katraj Snake Park is located at Katraj. NH4 is the national highway from Mumbai to Bangalore via Pune.

In olden times, the road from Pune to Satara went over the top of the hill. A tunnel (the old tunnel) was constructed when two-lane national highway, NH4, was constructed in 1980s.^{[citation needed]} A new tunnel was bored through the hill for widening the highway to four lanes in 2007.

The old tunnel is located on Katraj ghat. It is used by MSRTC buses and other vehicles from Swargate to south Maharashtra and few travelling in Konkan area and on the return route.

The New Katraj Tunnel is located on the NH 4, Pune, India. It is a three-lane tunnel. The tunnel is 1,338 metre long . This tunnel replaced the Old Katraj Tunnel.

Katraj Ghat (mountain pass) begins at the south of Katraj village. At the southern end of the ghat, the new alignment of NH4 through the New Katraj Tunnel merges with the old alignment of the highway.

Rajiv Ratna Gandhi /ˈrɑːdʒiːv ˈɡɑːndiː/ ( pronunciation (help·info); 20 August 1944 – 21 May 1991) was the sixth Prime Minister of India (1984–1989). He took office after his mother's assassination on 31 October 1984; he himself was assassinated on 21 May 1991. He became the youngest Prime Minister of India when he took office at the age of 40.

Rajiv Gandhi was the eldest son of Indira and Feroze Gandhi. He went to study at Trinity College, Cambridge, and later at Imperial College London, but did not complete a degree at either. At Cambridge he met the Italian-born Antonia Albina Maino, then a waitress in a restaurant, whom he later married. After dropping out of university, he became a professional pilot for Indian Airlines. He remained aloof from politics, despite his family's political prominence. It was only following the death of his younger brother Sanjay Gandhi in 1980 that Rajiv entered politics. Following the assassination of his mother in 1984 after Operation Blue Star, the Indian National Congress party leaders nominated him to be Prime Minister.