Page 352 - Planning and Design of Airports
P. 352

308     Airp o r t  D e sign



                                    RUNWAY LENGTH
                             1,000 FEET       2,000 FEET
                                                         BIDIRECTIONAL WHITE
                         BIDIRECTIONAL WHITE/RED  BIDIRECTIONAL
                                              ALTERNATE
                               +12.5       RED/WHITE AND WHITE
                          75 FEET
                               –25
              RUNWAY
                END
                   C L



               SEE NOTE 1          SEE NOTE 1

                                    2,000 FEET      1,000 FEET
                                                          +12.5
                                                      75 FEET
                                                          –25


                                                                    C L





                   SEE NOTE 1

                  NOTE:
                  1. REFER TO PARAGRAPH 3.3a1 FOR RUNWAY CENTERLINE LIGHT FIXTURES PLACEMENT AND TOLERANCES.

                  LEGEND:
                    BIDIRECTIONAL RCL – WHITE BOTH DIRECTIONS
                    BIDIRECTIONAL RCL – RED IN DIRECTION OF SHADED SIDE
                                         WHITE IN DIRECTION OF WHITE SIDE
            FIGURE 8-12  Runway centerline lighting (Federal Aviation Administration).




                    Runway touchdown zone lights are white, consist of a three-bulb
                 bar on either side of the runway centerline, and extend 3000 ft from
                 the runway threshold or one-half the runway length if the runway is
                 less than 6000 ft long. They are spaced at intervals of 100 ft, with the
                 first light bar 100 ft from the runway threshold, and are located 36 ft
                 on either side of the runway centerline, as shown in Fig. 8-13. The
                 centerline lights are spaced at intervals of 50 ft. They are normally
                 offset a maximum of 2 ft from the centerline to avoid the centerline
                 paint line and the nose gear of the aircraft riding over the light fix-
                 tures. These lights are also white, except for the last 3000 ft of runway
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