Tens of thousands of racing fans are expected to descend on Sonoma Raceway this weekend for the Verizon IndyCar Series Grand Prix of Sonoma, the final IndyCar event at the Arnold Drive facility.

Here are some essential things you need to know about, including the race schedule and traffic warnings.

When:

Friday — Practice, 11 a.m. and 3 p.m.

Saturday — Practice, 11 a.m.; qualifying, 3 p.m.

Sunday — Grand Prix of Sonoma, 3:30 p.m.

Distance: 85 laps over a 2.385-mile, 12-turn road course, 202.725 miles

Tickets: $15 for Friday, $35 for Saturday and $39, $55, $60 or $75 for Sunday. Three-day passes are $76, $89, $94 and $106. For information and details on other ticket packages, visit racesonoma.com or call 800-870-RACE. Tickets also can be purchased at ticketmaster.com.

Traffic: Heavy traffic is expected on race days near the track, located at the intersection of Highway 37 and Highway 121.

For information on alternate travel routes, parking and what you can and can't bring into the facility, visit the sonomaraceway.com.