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Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 86, App. V—The Standard Road Cycle (SRC)
Current as of January 02, 2025 | Updated by Findlaw Staff
1. The standard road cycle (SRC) is a mileage accumulation cycle that may be used for any vehicle which is covered by the applicability provisions of § 86.1801. The vehicle may be run on a track or on a mileage accumulation dynamometer.
2. The cycle consists of 7 laps of a 3.7 mile course. The length of the lap may be changed to accommodate the length of the service-accumulation track.
|
Description of the SRC |
||
|---|---|---|
|
Lap |
Description |
Typical accel rate (MPH/s) |
|
1 |
(start engine) Idle 10 sec |
0 |
|
1 |
Mod accel to 30 MPH |
4 |
|
1 |
Cruise at 30 MPH for 1/4 lap |
0 |
|
1 |
Mod. decel to 20 MPH |
-5 |
|
1 |
Mod accel to 30 MPH |
4 |
|
1 |
Cruise at 30 MPH for 1/4 lap |
0 |
|
1 |
Mod. decel to stop |
-5 |
|
1 |
Idle 5 sec |
0 |
|
1 |
Mod accel to 35 MPH |
4 |
|
1 |
Cruise at 35 MPH for 1/4 lap |
0 |
|
1 |
Mod. decel to 25 MPH |
-5 |
|
1 |
Mod accel to 35 MPH |
4 |
|
1 |
Cruise at 35 MPH for 1/4 lap |
0 |
|
1 |
Mod. decel to stop |
-5 |
|
2 |
Idle 10 sec |
0 |
|
2 |
Mod accel to 40 MPH |
3 |
|
2 |
Cruise at 40 MPH for 1/4 lap |
0 |
|
2 |
Mod. decel to 30 MPH |
-5 |
|
2 |
Mod accel to 40 MPH |
3 |
|
2 |
Cruise at 40 MPH for 1/4 lap |
0 |
|
2 |
Mod. decel to stop |
-5 |
|
2 |
Idle 5 sec |
0 |
|
2 |
Mod accel to 45 MPH |
3 |
|
2 |
Cruise at 45 MPH for 1/4 lap |
0 |
|
2 |
Mod. decel to 35 MPH |
-5 |
|
2 |
Mod accel to 45 MPH |
3 |
|
2 |
Cruise at 45 MPH for 1/4> lap |
0 |
|
2 |
Mod. decel to stop |
-5 |
|
3 |
Idle 10 sec |
0 |
|
3 |
Hard accel to 55 MPH |
4 |
|
3 |
Cruise at 55 MPH for 1/4 lap |
0 |
|
3 |
Mod. decel to 45 MPH |
-5 |
|
3 |
Mod accel to 55 MPH |
2 |
|
3 |
Cruise at 55 MPH for 1/4 lap |
0 |
|
3 |
Mod. decel to 45 MPH |
-5 |
|
3 |
Mod accel to 60 MPH |
2 |
|
3 |
Cruise at 60 MPH for 1/4 lap |
0 |
|
3 |
Mod. decel to 50 MPH |
-5 |
|
3 |
Mod. accel to 60 MPH |
2 |
|
3 |
Cruise at 60 MPH for 1/4 lap |
0 |
|
3 |
Mod. decel to stop |
-4 |
|
4 |
Idle 10 sec |
0 |
|
4 |
Hard accel to 80 MPH |
3 |
|
4 |
Coastdown to 70 MPH |
-1 |
|
4 |
Cruise at 70 MPH for 1/2 Lap |
0 |
|
4 |
Mod. decel to 50 MPH |
-3 |
|
4 |
Mod accel to 65 MPH |
2 |
|
4 |
Cruise at 65 MPH for 1/2 lap |
0 |
|
4 |
Mod. decel to 50 MPH |
-3 |
|
5 |
Mod accel to 75 MPH |
1 |
|
5 |
Cruise at 75 MPH for 1/2 lap |
0 |
|
5 |
Mod. decel to 50 MPH |
-3 |
|
5 |
Lt. accel to 70 MPH |
1 |
|
5 |
Cruise at 70 MPH for 1/2 lap |
0 |
|
5 |
Mod. decel 50 MPH |
-3 |
|
6 |
Mod accel to 70 MPH |
2 |
|
6 |
Coastdown to 60 MPH |
-1 |
|
6 |
Cruise at 60 MPH for 1/2 lap |
0 |
|
6 |
Mod. decel to 50 MPH |
-4 |
|
6 |
Mod. accel to 65 MPH |
1 |
|
6 |
Cruise at 65 MPH for 1/2 lap |
0 |
|
6 |
Mod. decel to stop |
-4 |
|
7 |
Idle 45 sec |
0 |
|
7 |
Hard accel to 55 MPH |
4 |
|
7 |
Cruise at 55 MPH for 1/4 lap |
0 |
|
7 |
Mod. decel to 40 MPH |
-5 |
|
7 |
Mod. accel to 55 MPH |
2 |
|
7 |
Cruise at 55 MPH for 1/4 lap |
0 |
|
7 |
Mod. decel to 40 MPH |
-5 |
|
7 |
Mod. accel to 50 MPH |
2 |
|
7 |
Cruise at 50 MPH for 1/4 lap |
0 |
|
7 |
Mod. decel to 40 MPH |
-5 |
|
7 |
Mod. accel to 50 MPH |
2 |
|
7 |
Cruise at 50 MPH for 1/4 lap |
0 |
|
7 |
Mod. decel to stop |
-5 |
The standard road cycle is represented graphically in the following figure:
Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 86, App. V—The Standard Road Cycle (SRC) - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-pt-40-86-app-v/
FindLaw Codes may not reflect the most recent version of the law in your jurisdiction. Please verify the status of the code you are researching with the state legislature before relying on it for your legal needs.
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