SANTA CLARA — Despite all the excitement over the 49ers’ new home, fans are hardly pumped about actually getting to Levi’s Stadium, fearing they’ll end up sitting for hours in standstill traffic.

But consider this: Instead of 20,000 vehicles lining up off one freeway ramp like a school of fish, as was the case at log-jammed Candlestick Park, fans arriving at Levi’s Stadium will be spread out into several clusters of cars coming from about a half-dozen freeway offramps. Each fan will get custom driving directions to their parking spot, sharing routes with as few as a couple hundred other vehicles, and will be guided there by about two dozen upgraded traffic lights that will be synchronized starting four hours before kickoff.

Not interested in driving? Trains will be shuttling fans out of the stadium every 10 minutes, two lots will have spots for bicycles, and ride services from Uber to private buses will have designated areas for pick-ups and dropoffs.

The details are all part of a new traffic, parking and operations plan the 49ers and Santa Clara have released just days from Thursday’s ribbon-cutting to christen the $1.3 billion stadium. The multimillion-dollar traffic system, set to be approved by the City Council on Tuesday night, is the result of three years of exhaustively detailed research that included 49ers fan surveys, traffic studies and several community meetings.

Still, the blueprint can only do so much to ease the inevitable frustrations that come from 70,000 people cramming into one area, and it relies on a lot of cooperation from fans who must plan ahead.

“Even with what we’re doing, there is going to be traffic,” said Jim Mercurio, the 49ers vice president of operations. “We think we got a pretty good handle on it. But sometimes you just don’t know how it’s going to go until you actually get 20,000 cars here.”

The plan lays out exactly how fans from across the Bay Area and beyond will settle into nearly 30,000 parking spaces that span 28 lots.

Each fan will have custom turn-by-turn directions, based on the lot they’re using and where they’re coming from, that includes overhead video supplied by a law enforcement chopper that took footage Monday.

“I don’t want people taking directions from Google Maps,” Mercurio said, calling the new traffic system “kind of unprecedented.”

In addition to spreading out traffic, the routes outlined by the 49ers are important because the streets and traffic lights will be set up to speed up anyone using them — and send anyone who tries to forge their own path into even worse gridlock.

About two-dozen intersections in the neighborhood will be altered, with some lanes closed and crosswalks added or removed to further facilitate traffic. Buses and bikes will have their own routes, too.

The travel suggestions will be printed on the back of parking passes and available online, though the best bet for many fans will be a mobile app that will show real-time traffic, directions and parking availability. Nearly 30 temporary signs, which crews will start setting up at 3 a.m. on Sundays, will also help guide fans on game days.

The whole process will be reversed to get fans home, with workers switching lane closures and traffic signals at halftime.

“It sounds like they’re going above and beyond,” said Travis McDonald, a season-ticket holder from San Jose.

Others aren’t so optimistic: “It’s going to be a nightmare,” said Niners fan Ryan Stanley, 27, of Oakland. The plan “can reduce traffic, but I can’t imagine it being easy.”

Three-quarters of the parking spots — starting at $40 a pop — will be set aside for season-ticket holders, who have already gobbled up 12,000 parking passes. The rest are farther away from the stadium and available on a first-come, first-served basis.

Among the other new details from the plan:

Caltrain will add two trains from San Francisco before games, during what is normally hourly service, to get fans to the Valley Transportation Authority transfer point in Mountain View.

VTA, which has a light-rail station outside the stadium, will be sending trains in and out every 10 minutes. It estimates that after games, about half of fans will be able to hop on a train within 35 minutes of the final whistle, and everyone will be on board within an hour and 20 minutes.

Uber, Sidecar and Lyft drivers, in addition to taxis and charter buses, will be allowed to drop off fans and line up on designated nearby streets to take them home.