Code of Federal Regulations Title 49. Transportation 49 CFR § 575.104, App. A Appendix A—Treadwear Test Course and Driving Procedures

Introduction. The test course consists of three loops of a total of 400 miles in the geographical vicinity of Goodfellow AFB, San Angelo, Tex.

The first loop runs south 143 miles through the cities of Eldorado, Sonora, and Juno, Tex. to the Camp Hudson Historical Marker, and returns by the same route.

The second loop runs east over Farm and Ranch Roads (FM) and returns to its starting point.

The third loop runs northwest to Water Valley, northeast toward Robert Lee and returns via Texas 208 to the vicinity of Goodfellow AFB.

Route. The route is shown in Figure 3. The table identifies key points by number. These numbers are encircled in Figure 3 and in parentheses in the descriptive material that follows.

Southern Loop. The course begins at the intersection (1) of Ft. McKavitt Road and Paint Rock Road (FM388) at the northwest corner of Goodfellow AFB. Drive east via FM 388 to junction with Loop Road 306 (2). Turn right onto Loop Road 306 and proceed south to junction with US277 (3). Turn onto US277 and proceed south through Eldorado and Sonora (4), continuing on US277 to junction with FM189 (5). Turn right onto FM189 and proceed to junction with Texas 163 (6). Turn left onto Texas 163, and at the option of the manufacturer:

(A) Proceed south to Camp Hudson Historical Marker and onto the paved shoulder (7). Reverse route to junction of Loop Road 306 and FM 388 (2);  or

(B) Proceed south to junction with Frank's Crossing. Reverse route at Frank's Crossing and proceed north on Texas 163 to junction with Highway 189;  Reverse route at junction with Highway 189;  proceed south on Texas 163 to junction with Frank's Crossing;  reverse route at Frank's Crossing and proceed north to junction of Loop Road 306 and FM 388 (2).

Eastern Loop. From junction of Loop Road 306 and FM388 (2), make right turn onto FM388 and drive east to junction with FM2334 (13). Turn right onto FM2334 and proceed south across FM765 (14) to junction of FM2334 and US87 (15). For convoys that originate at Goodfellow AFB, make U-turn and return to junction of FM388 and Loop Road 306 (2) by the same route. For convoys that do not originate at Goodfellow AFB, upon reaching junction of FM2334 and US87 (15), make U-Turn and continue north on FM2334 past the intersection with FM388 to Veribest Cotton Gin, a distance of 1.8 miles beyond the intersection. Make U-turn and return to junction of FM2334 and FM388. Turn right onto FM388, proceed west to junction FM388 and Loop Road 306.

Northwestern Loop. From junction of Loop Road 306 and FM388 (2), make right turn onto Loop Road 306. Proceed onto US277, to junction with FM2105 (8). Turn left onto FM2105 and proceed west to junction with US87 (10). Turn right on US87 and proceed northwest to the junction with FM2034 near the town of Water Valley (11). Turn right onto FM2034 and proceed north to Texas 208 (12). Turn right onto Texas 208 and proceed south to junction with FM2105 (9). Turn left onto FM2105 and proceed east to junction with US277 (8). Turn right onto US277 and proceed south onto Loop Road 306 to junction with FM388 (2). For convoys that originate at Goodfellow AFB, turn right onto FM388 and proceed to starting point at junction of Ft. McKavitt Road and FM388 (1). For convoys that do not originate at Goodfellow AFB, do not turn right onto FM388 but continue south on Loop Road 306.

Alternate Route When FM 189 and Texas 163 are Closed. This alternate test course route consists of a Modified Southern Loop, the Eastern Loop and Northwestern Loop described above, and a Modified Northwestern Loop.

Modified Southern Loop. The course begins at the intersection (1) of Ft. McKavitt Road and Paint Rock Road (FM 388) at the northwest corner of Goodfellow AFB. Drive east via FM 388 to junction with Loop Road 306 (2). Turn right onto Loop Road 306 and proceed south to junction with US 277 (3). Turn onto US 277 and proceed south through Eldorado and Sonora (4), continuing on US 277 approximately 5.5 miles (from traffic light at separation of US 277 and Loop 467) to picnic area on right. Reverse route at this location and proceed north to junction of Loop 306 and FM 388 (2).

Eastern Loop and Northwestern Loop. From junction of Loop Road 306 and FM 388 (2), complete the Eastern Loop, the Northwestern Loop, and then, from junction of Loop Road 306 and FM 388 (2), repeat the Eastern Loop.

Modified Northwestern Loop. Proceed north on Northwestern Loop as normal until reaching the intersection of FM 2105 and Texas 208 and turn right onto Texas 208. Proceed on Texas 208 until the intersection with FM 2034. Turn left onto FM 2034 and continue on FM 2034 to the intersection with US 87. Turn left onto US 87. At the intersection of US 87 and FM 2105 turn left onto FM 2105 and proceed to the intersection with US 277. Turn right onto US 277 and proceed to the intersection of Loop Road 306 and FM 388 (2).

Repeat Eastern Loop. Turn left onto FM 388 and repeat the Eastern Loop. For convoys that originate at Goodfellow AFB, continue on FM 388 and proceed to starting point at junction of Ft. McKavitt Road and FM 388 (1). For convoys that do not originate at Goodfellow AFB, turn left onto Loop Road 306.

Driving instructions. The drivers shall run at posted speed limits throughout the course unless an unsafe condition arises. If such condition arises, the speed should be reduced to the maximum safe operating speed.

Braking Procedures at STOP signs. There are a number of intersections at which stops are required. At each of these intersections a series of signs is placed in a fixed order at follows:

Sign Legend

Highway Intersection 1000 (or 2000) Feet

STOP AHEAD

Junction XXX

Direction Sign (Mereta→)

STOP or YIELD

Procedures. 1. Approach each intersection at posted speed limit.

2. When abreast of the STOP AHEAD sign, apply the brakes so that the vehicle decelerates smoothly to 20 mph when abreast of the direction sign.

3. Come to a complete stop at the STOP sign or behind any vehicle already stopped.