Document ID: chunk:federal_register_of_legislation:F2023C00133:body:0:p14
Version: federal_register_of_legislation:F2023C00133
Segment Type: other
Provision Reference: 
Character Range: 42298–45352

first extinction of the light.
7.3.11.2.                    In the case of a vehicle which supplies alternating current to the direction indicators:
7.3.11.2.1.              where the speed of the engine is between 50 per cent and 100 per cent of the engine speed corresponding to the maximum speed of the vehicle:
7.3.11.2.1.1.       the light flashing frequency shall be 90 ± 30 times per minute,
7.3.11.2.1.2.       the flashing of the direction indicators on the same side of the vehicle may occur synchronously or alternately;
7.3.11.2.1.3.       operation of the light-signal control shall be followed within not more than one second by the appearance of the light and within not more than one-and-one-half seconds by the first extinction of the light.
7.3.11.2.2.              where the speed of the engine is between the idling speed indicated by the manufacturer and 50 per cent of the engine speed corresponding to the maximum speed of the vehicle:
7.3.11.2.2.1.       the light flashing frequency shall be between 90 + 30 and 90 - 45 times per minute;
7.3.11.2.2.2.       the flashing of the direction indicators on the same side of the vehicle may occur synchronously or alternately;
7.3.11.2.2.3.       operation of the light-signal control shall be followed within not more than one second by appearance of the light and within not more than one-and-one-half seconds by the first extinction of the light.
7.3.11.3.                    In the event of failure, other than a short circuit, of one 'Direction Indicator Lamp', the other 'Direction Indicator Lamp(s)' indicating the same direction must continue to flash or remain alight, but the frequency in this condition may be different from that prescribed.
7.3.12.                          Figure 1 (see clauses 7.3.1., 7.3.4.1. and 7.3.5.)

              (*) The value of 5° given for dead angle of visibility to the rear of the side direction-indicator is an upper limit d ≤ 1.80 m (for M1 and N1 category vehicles d ≤ 2.50 m).
For the 'Direction Indicator Lamp(s)' direction indicator lamps of categories 1, 1a, 1b, 2a and 2b mounted below 750 mm, the inward angle of 45° may be reduced to 20° under the H plane.

7.4.                                    'STOP LAMP'
7.4.1.                              Number:
7.4.1.1.                        one or two lamps to ADR 53/... for LB2 and LE2 vehicles;
7.4.1.2.                        two lamps to ADR 53/... or ADR 49/... for LB1 vehicles;
7.4.1.3.                        two lamps to ADR 49/... for LE1 vehicles.
7.4.2.                              Arrangement: No special requirement.
7.4.3.                              Position:
7.4.3.1.                        in width:
7.4.3.1.1.                  for LB2 and LE2 vehicles with a single 'Stop Lamp' fitted, the 'Centre of Reference' shall be in the median longitudinal plane of the vehicle;
7.4.3.1.2.                  for all other vehicles to which this rule applies, the lamps shall be not less than 600 mm apart. This distance may be reduced to 400 mm if the overall width of the