NASCAR announced the pit road speed limits for the 2021 season for each venue.
| Track | Pit Road | Caution Vehicle |
| Atlanta Motor Speedway | 45 | 55 |
| Bristol Motor Speedway | 30 | 35 |
| Bristol Motor Speedway – Dirt | 30 | 35 |
| Canadian Tire Motorsports Park | 40 | 45 |
| Charlotte Motor Speedway – Oval | 45 | 55 |
| Charlotte Motor Speedway – Road Course | 40 | 45 |
| Circuit of the Americas | 40 | 50 |
| Darlington Raceway | 45 | 50 |
| Daytona International Speedway | 55 | 70 |
| Daytona International Speedway – Road Course | 45 | 50 |
| Dover International Speedway | 35 | 45 |
| Elkhart Lake’s Road America | 40 | 45 |
| Homestead-Miami Speedway | 45 | 55 |
| Indianapolis Motor Speedway – Road Course | 40 | 45 |
| Kansas Speedway | 45 | 55 |
| Knoxville Speedway | 30 | 30 |
| Las Vegas Motor Speedway | 45 | 55 |
| Martinsville Speedway | 30 | 35 |
| Michigan International Speedway | 55 | 65 |
| Mid-Ohio Sports Car Course | 35 | 45 |
| Nashville Superspeedway | 45 | 55 |
| New Hampshire Motor Speedway | 45 | 50 |
| Phoenix Raceway | 45 | 50 |
| Pocono Raceway | 55 | 70 |
| Richmond Raceway | 40 | 45 |
| Sonoma Raceway | 40 | 45 |
| Talladega Superspeedway | 55 | 70 |
| Texas Motor Speedway | 45 | 55 |
| Watkins Glen International | 40 | 45 |
| Worldwide Technology Raceway at Gateway | 45 | 50 |