Nightmarishly congested city could soon have America's best subway network - but famous millionaire is furious about prospect of tunnel running under his mansion

The Los Angeles Metro is reviewing proposals to build a subway line down the 405 to alleviate car traffic and get commuters from the Valley to West Los Angeles in just 20 minutes - but the city's richest aren't happy about it. 

The Sepulveda Corridor transit project proposed adding eight new stops - including Ventura Boulevard, UCLA, and Santa Monica, among others - to get some of the 300,000 daily drivers off the nightmarish bumper-to-bumper traffic on I-405 and onto public transit. 

The newly proposed line - which would be one of the most advanced transit lines in the world - would connect riders to several other subway lines, as well as, bus routes and Amtrak, according to Sepulveda Transit Corridor Partners. 

'It's going to be clean, it's going to be fast, it's going to be autonomous. It is going to literally change the way we travel to the Valley to the Westside and downtown,' Felicia Bell, with the Corridor Partners, said. 'Twenty minutes, you can't beat.' 

The company has also help developed London's Elizabeth line, the Paris Metro, and other parts of LA's public transit system. 

However, not everyone is overjoyed by the proposal, especially Ticketmaster's former CEO, Fred Rosen, who has made it his mission to stop the transit line running underneath his expensive Bel-Air mansion. 

The Los Angeles Metro is reviewing proposals to build a subway line down the 405 to alleviate car traffic and get commuters from the Valley to West Los Angeles in just 20 minutes

The Sepulveda Corridor transit project proposed adding eight new stops - including Ventura Boulevard, UCLA, and Santa Monica, among others - to get some of the 300,000 daily drivers off the bumper-to-bumper traffic on I-405 (pictured)

'They don’t understand who they’re dealing with, okay?' the 80-year-old told The Hollywood Reporter. 'I will not go gently into that good night.'

He invited Metro CEO Stephanie Wiggins to the Hotel Bel-Air for a meeting, to which he claimed she thought the venue was 'beautiful.' 

'And your morons want to dig a tunnel under it,' he recalled saying.  

Rosen claimed he and his wealthy neighbors don't want construction workers digging underneath their homes to build the rail line. Instead, they prefer the monorail proposals out of the six available that would offer great views, but avoid digging under their homes. 

'A modern, spacious monorail with a view along the 405 Freeway makes more sense than a dark, underground subway tunnel through an earthquake and flood zone,' Bel-Air resident and Lionsgate CEO, Jon Feltheimer, told The Hollywood Reporter. 

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The newly proposed line - which would be one of the most advanced transit lines in the world - would connect riders to several other subway lines, as well as, bus routes and Amtrak (pictured: L-R: current transit system and proposed line in pink right) 

'It will be cheaper, easier to build and more forward-looking.' 

Ticketmaster's former CEO, Fred Rosen, has made it his mission to stop the transit line running underneath his expensive Bel-Air mansion

The monorail system, which is being proposed by BYD, would get commuters end-to-end in just over 30 minutes and would largely run on the surface of the 405 and would be able to extend to LAX quicker than the underground version, according to Benjamin Schneider. 

However, the underground system has a much higher projection for ridership levels with an estimated 120,000 versus only 86,000 daily commuters on the monorail, according to Schneider.  

Despite their wealthy wishes, the Metro is largely ignoring the millionaires in favor of an underground system that would cut commute times in half. 

For example, the commute from Ventura Boulevard to UCLA's campus could be cut in half by the rail line, going from roughly a 15-to-30-minute drive to a 6.5-minute commute by train, according to Benjamin Schneider. 

The entire 15-mile route takes anywhere between 30 to 60 minutes to drive by car, meaning on a good day, commuters would save 10 minutes. On a bad day, their commute would be cut by two-thirds just by taking the train. 

The commute from Ventura Boulevard to UCLA's campus could be cut in half by the rail line, going from roughly a 15-to-30-minute drive to a 6.5-minute commute by train (pictured: UCLA Station concept)

The automated trains would accomplish this by going 70mph underground and trains would be around 2.5 minutes apart, but could be reduced to every 90 seconds 'when needed' (pictured: Wilshire Station concept)

The automated trains would accomplish this by going 70mph underground and trains would be around 2.5 minutes apart, but could be reduced to every 90 seconds 'when needed,' according to Yusef Robb, who works for Sepulveda Transit Corridor Partners. 

It would run faster than other LA Metro lines that come between every eight and 12 minutes during peak hours. 

It would also be faster than rival New York City's transit system that has trains running roughly every two to five minutes during rush hours and every five to 10 minutes for most of the day. 

The forecasted opening for the new line is between 2033 and 2035.