This is the only tunnel in Mumbai-Ahmedabad high-speed rail corridor's (MAHSR) C-4 package.
https://timesofindia.indiatimes.com/city/ahmedabad/construction-of-mountain-tunnel-for-mumbaiahmedabad-high-speed-rail-corridor-begins/articleshow/103966462.cms
The construction work for a mountain tunnel under the C4 package (design and construction of 237km length viaduct between Vapi and Vadodara in Gujarat
https://timesofindia.indiatimes.com/city/ahmedabad/construction-of-mountain-tunnel-for-mumbaiahmedabad-high-speed-rail-corridor-begins/articleshow/103966462.cms
Construction of mountain tunnel for Mumbai–Ahmedabad high-speed rail corridor begins | Ahmedabad News - Times of India
timesofindia.indiatimes.comThe construction work for a mountain tunnel under the C4 package (design and construction of 237km length viaduct between Vapi and Vadodara in Gujarat