Federal Motor Carrier Safety Administration, DOT Ch. III, Subch. B, App. G Sec. 44 Commercial zones determined generally, Sec. 45 Controlling distances and population with exceptions. data. The commercial zone of each municipality In the application of § 372.241: in the United States, with the exceptions in- (a) Air-line distances or mileages about dicated in the note at the end of this section, corporate limits of municipalities shall be within which the transportation of pas- used. sengers or property, in interstate or foreign (b) The population of any municipality commerce, when not under a common con- shall be deemed to be the highest figure trol, management, or arrangement for a con- shown for that municipality in any decennial tinuous carriage or shipment to or from a census since (and including) the 1940 decen- point without such zone, is exempt from all nial census. provisions of Part II, Interstate Commerce Act, except the provisions of section 204 rel- [53 FR 18058, May 19, 1988, as amended at 62 ative to the qualifications and maximum FR 49942, Sept. 24, 1997] hours of service of employees and safety of operation or standards of equipment shall be APPENDIX G TO SUBCHAPTER B—MIN- deemed to consist of: IMUM PERIODIC INSPECTION STAND- (a) The municipality itself, hereinafter ARDS called the base municipality; A vehicle does not pass an inspection if it (b) All municipalities which are contiguous has one of the following defects or defi- to the base municipality; ciencies: (c) All other municipalities and all unin- 1. Brake System. corporated area within the United States a. Service brakes.—(1) Absence of braking which are adjacent to the base municipality action on any axle required to have brakes as follows: upon application of the service brakes (such (1) When the base municipality has a popu- as missing brakes or brake shoe(s) failing to lation less than 2,500 all unincorporated move upon application of a wedge, S-cam, areas within two miles of its corporate lim- cam, or disc brake). its and all of any other municipality any (2) Missing or broken mechanical compo- part of which is within two miles of the cor- nents including: shoes, lining, pads, springs, porate limits of the base municipality, anchor pins, spiders, cam rollers, push-rods, (2) When the base municipality has a popu- and air chamber mounting bolts. lation of 2,500 but less than 25,000, all unin- (3) Loose brake components including air corporated areas within 3 miles of its cor- chambers, spiders, and cam shaft support porate limits and all of any other munici- brackets. pality any part of which is within 3 miles of the corporate limits of the base munici- (4) Audible air leak at brake chamber (Ex- pality, ample-ruptured diaphragm, loose chamber clamp, etc.). (3) When the base municipality has a popu- lation of 25,000 but less than 100,000, all unin- (5) Readjustment limits. The maximum corporated areas within 4 miles of its cor- stroke at which brakes should be readjusted 1 ″ porate limits and all of any other munici- is given below. Any brake ⁄4 or more past pality any part of which is within 4 miles of the readjustment limit or any two brakes 1 ″ the corporate limits of the base munici- less than ⁄4 beyond the readjustment limit pality, and shall be cause for rejection. Stroke shall be measured with engine off and reservoir pres- (4) When the base municipality has a popu- lation of 100,000 or more, all unincorporated sure of 80 to 90 psi with brakes fully applied. areas within 5 miles of its corporate limits and all of any other municipality any part of BOLT TYPE BRAKE CHAMBER DATA which is within 5 miles of the corporate lim- Maximum its of the base municipality, and Effective stroke at (d) All municipalities wholly surrounded, Outside which Type area (sq. dia. (in.) brakes or so surrounded except for a water bound- in.) should be ary, by the base municipality, by any mu- readjusted nicipality contiguous thereto, or by any mu- nicipality adjacent thereto which is included A .............................. 12 615⁄16 13⁄8 3 3 in the commercial zone of such base munici- B .............................. 24 9 ⁄16 1 ⁄4 1 3 pality under the provisions of paragraph (c) C .............................. 16 8 ⁄16 1 ⁄4 D .............................. 6 51⁄4 11⁄4 of this section. E .............................. 9 63⁄16 13⁄8 NOTE: Except: Municipalities the commer- F .............................. 36 11 21⁄4 cial zones of which have been or are here- G .............................. 30 97⁄8 2 after individually or specially determined. 1117 VerDate 11<MAY>2000 09:16 Nov 28, 2001 Jkt 194203 PO 00000 Frm 01117 Fmt 8010 Sfmt 8002 Y:\SGML\194203T.XXX pfrm01 PsN: 194203T Ch. III, Subch. B, App. G 49 CFR Ch. III (10–1–01 Edition) ROTOCHAMBER DATA (2) Any portion of the drum or rotor miss- ing or in danger of falling away. Maximum d. Brake Hose. stroke at (1) Hose with any damage extending Effective Outside which Type area (sq. dia. (in.) brakes through the outer reinforcement ply. (Rub- in.) should be ber impregnated fabric cover is not a rein- readjusted forcement ply). (Thermoplastic nylon may have braid reinforcement or color difference 9 ............................. 9 49⁄32 11⁄2 12 ............................. 12 413⁄16 11⁄2 between cover and inner tube. Exposure of 16 ............................. 16 513⁄32 2 second color is cause for rejection. 20 ............................. 20 515⁄16 2 (2) Bulge or swelling when air pressure is 24 ............................. 24 613⁄32 2 applied. 30 ............................. 30 71⁄16 21⁄4 (3) Any audible leaks. 5 3 36 ............................. 36 7 ⁄8 2 ⁄4 (4) Two hoses improperly joined (such as a 50 ............................. 50 87⁄8 3 splice made by sliding the hose ends over a piece of tubing and clamping the hose to the CLAMP TYPE BRAKE CHAMBER DATA tube). (5) Air hose cracked, broken or crimped. Maximum e. Brake Tubing. stroke at Effective Outside which (1) Any audible leak. Type area (sq. (2) Tubing cracked, damaged by heat, bro- in.) dia. (in.) brakes should be ken or crimped. readjusted f. Low Pressure Warning Device missing, in- 6 ............................. 6 41⁄2 11⁄4 operative, or does not operate at 55 psi and 1 9 ............................. 9 51⁄4 13⁄8 below, or ⁄2 the governor cut-out pressure, 12 ............................. 12 511⁄16 13⁄8 whichever is less. 16 ............................. 16 63⁄8 13⁄4 g. Tractor Protection Valve. Inoperable or 20 ............................. 20 625⁄32 13⁄4 missing tractor protection valve(s) on power 7 1 3 24 ............................. 24 7 ⁄32 1 ⁄4 unit. 30 ............................. 30 83⁄32 2 h. Air Compressor. 36 ............................. 36 9 21⁄4 (1) Compressor drive belts in condition of 1 (2″ for long stroke design). impending or probable failure. Wedge Brake Data.—Movement of the scribe (2) Loose compressor mounting bolts. mark on the lining shall not exceed 1⁄16 inch. (3) Cracked, broken or loose pulley. (6) Brake linings or pads. (4) Cracked or broken mounting brackets, (a) Lining or pad is not firmly attached to braces or adapters. the shoe; i. Electric Brakes. (b) Saturated with oil, grease, or brake (1) Absence of braking action on any wheel fluid; or required to have brakes. (c) Non-steering axles: Lining with a thick- (2) Missing or inoperable breakaway brak- ness less than 1⁄4 inch at the shoe center for ing device. air drum brakes, 1⁄16 inch or less at the shoe j. Hydraulic Brakes. (Including Power Assist center for hydraulic and electric drum Over Hydraulic and Engine Drive Hydraulic brakes, and less than 1⁄8 inch for air disc Booster). brakes. (1) Master cylinder less than 1⁄4 full. (d) Steering axles: Lining with a thickness (2) No pedal reserve with engine running less than 1⁄4 inch at the shoe center for drum except by pumping pedal. brakes, less than 1⁄8 inch for air disc brakes (3) Power assist unit fails to operate. and 1⁄16 inch or less for hydraulic disc and (4) Seeping or swelling brake hose(s) under electric brakes. application of pressure. (7) Missing brake on any axle required to (5) Missing or inoperative check valve. have brakes. (6) Has any visually observed leaking hy- (8) Mismatch across any power unit steer- draulic fluid in the brake system. ing axle of: (7) Has hydraulic hose(s) abraded (chafed) (a) Air chamber sizes. through outer cover-to-fabric layer. (b) Slack adjuster length. (8) Fluid lines or connections leaking, re- b. Parking Brake System. No brakes on the stricted, crimped, cracked or broken. vehicle or combination are applied upon ac- (9) Brake failure or low fluid warning light tuation of the parking brake control, includ- on and/or inoperative. ing driveline hand controlled parking k. Vacuum Systems. Any vacuum system brakes. which: c. Brake Drums or Rotors. (1) Has insufficient vacuum reserve to per- (1) With any external crack or cracks that mit one full brake application after engine is open upon brake application (do not confuse shut off. short hairline heat check cracks with flex- (2) Has vacuum hose(s) or line(s) restricted, ural cracks). abraded (chafed) through outer cover to cord 1118 VerDate 11<MAY>2000 09:16 Nov 28, 2001 Jkt 194203 PO 00000 Frm 01118 Fmt 8010 Sfmt 8002 Y:\SGML\194203T.XXX pfrm01 PsN: 194203T Federal Motor Carrier Safety Administration, DOT Ch. III, Subch. B, App. G ply, crimped, cracked, broken or has collapse (b) Any missing or ineffective fasteners. of vacuum hose(s) when vacuum is applied. (2) Integrity. (3) Lacks an operative low-vacuum warn- (a) Any cracks.