return
{
  structure =
  {
    layers =
    {
      util.sprite_load("__elevated-rails__/graphics/entity/elevated-rail-signal/elevated-rail-signal",
        {
          priority = "high",
          frame_count = 3,
          direction_count = 25,
          scale = 0.5,
        }
      ),
      util.sprite_load("__elevated-rails__/graphics/entity/elevated-rail-signal/elevated-rail-signal-lights",
        {
          priority = "low",
          blend_mode = "additive",
          draw_as_light = true,
          frame_count = 3,
          direction_count = 25,
          scale = 0.5,
        }
      ),
    }
  },
  structure_render_layer = "elevated-rail-stone-path",
  structure_align_to_animation_index =
  {
    --  X0Y0, X1Y0, X0Y1, X1Y1
    --  Left turn  | Straight/Multi |  Right turn
    00, 00, 00, 00,  00, 00, 00, 00,  00, 00, 00, 00, -- North
    01, 01, 01, 01,  01, 01, 01, 01,  02, 01, 01, 01,
    03, 03, 03, 03,  03, 03, 03, 03,  03, 03, 03, 03,
    05, 04, 04, 04,  04, 04, 04, 04,  04, 04, 04, 04,
    06, 06, 06, 06,  06, 06, 06, 06,  06, 06, 06, 06, -- East
    07, 07, 07, 07,  07, 07, 07, 07,  07, 08, 07, 07,
    09, 09, 09, 09,  09, 09, 09, 09,  09, 09, 09, 09,
    10, 11, 10, 10,  10, 10, 10, 10,  10, 10, 10, 10,
    12, 12, 12, 12,  12, 12, 12, 12,  12, 12, 12, 12, -- South
    14, 13, 13, 13,  13, 13, 13, 13,  13, 13, 13, 15,
    16, 16, 16, 16,  16, 16, 16, 16,  16, 16, 16, 16,
    17, 17, 17, 18,  17, 17, 17, 17,  17, 17, 17, 17,
    19, 19, 19, 19,  19, 19, 19, 19,  19, 19, 19, 19, -- West
    20, 20, 20, 20,  20, 20, 20, 20,  20, 20, 21, 20,
    22, 22, 22, 22,  22, 22, 22, 22,  22, 22, 22, 22,
    23, 23, 24, 23,  23, 23, 23, 23,  23, 23, 23, 23,
  },
  signal_color_to_structure_frame_index =
  {
    green  = 0,
    yellow = 1,
    red    = 2,
  },
  selection_box_shift =
  {
    -- Given this affects SelectionBox, it is part of game state.
    -- NOTE: Those shifts are not processed (yet) by PrototypeAggregateValues::calculateBoxExtensionForSelectionBoxSearch()
    --    so if you exceed some reasonable values, a signal may become unselectable
    -- NOTE: only applies to normal selection box. It is ignored for chart selection box
    --

    --  X0Y0, X1Y0, X0Y1, X1Y1
    --  1st - Left turn
    --  2nd - Straight/Multi
    --  3rd - Right turn

    -- North
    {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10},
    {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10},
    {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10}, {-0.06,-0.10},

    {-0.35,-0.37}, {-0.35,-0.37}, {-0.35,-0.37}, {-0.35,-0.37},
    {-0.35,-0.37}, {-0.35,-0.37}, {-0.35,-0.37}, {-0.35,-0.37},
    {-0.50,-0.50}, {-0.35,-0.37}, {-0.35,-0.37}, {-0.35,-0.37},

    {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12},
    {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12},
    {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12}, {-0.18,-0.12},

    {-0.58,-0.58}, {-0.29,-0.43}, {-0.29,-0.43}, {-0.29,-0.43},
    {-0.29,-0.43}, {-0.29,-0.43}, {-0.29,-0.43}, {-0.29,-0.43},
    {-0.29,-0.43}, {-0.29,-0.43}, {-0.29,-0.43}, {-0.29,-0.43},


    -- East
    {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11},
    {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11},
    {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11}, {-0.00,-0.11},

    { 0.21,-0.45}, { 0.21,-0.45}, { 0.21,-0.45}, { 0.21,-0.45},
    { 0.21,-0.45}, { 0.21,-0.45}, { 0.21,-0.45}, { 0.21,-0.45},
    { 0.21,-0.45}, { 0.53,-0.54}, { 0.21,-0.45}, { 0.21,-0.45},

    { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15},
    { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15},
    { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15}, { 0.17,-0.15},

    { 0.49,-0.22}, { 0.52,-0.54}, { 0.49,-0.22}, { 0.49,-0.22},
    { 0.49,-0.22}, { 0.49,-0.22}, { 0.49,-0.22}, { 0.49,-0.22},
    { 0.49,-0.22}, { 0.49,-0.22}, { 0.49,-0.22}, { 0.49,-0.22},


    -- South
    { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11},
    { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11},
    { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11}, { 0.06,-0.11},

    { 0.47,-0.11}, { 0.23, 0.05}, { 0.23, 0.05}, { 0.23, 0.05},
    { 0.23, 0.05}, { 0.23, 0.05}, { 0.23, 0.05}, { 0.23, 0.05},
    { 0.23, 0.05}, { 0.23, 0.05}, { 0.23, 0.05}, { 0.42, 0.07},

    {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08},
    {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08},
    {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08}, {-0.01,-0.08},

    { 0.11, 0.01}, { 0.11, 0.01}, { 0.11, 0.01}, { 0.37, 0.19},
    { 0.11, 0.01}, { 0.11, 0.01}, { 0.11, 0.01}, { 0.11, 0.01},
    { 0.11, 0.01}, { 0.11, 0.01}, { 0.11, 0.01}, { 0.11, 0.01},


    -- West
    { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17},
    { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17},
    { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17}, { 0.01,-0.17},

    {-0.03, 0.03}, {-0.03, 0.03}, {-0.03, 0.03}, {-0.03, 0.03},
    {-0.03, 0.03}, {-0.03, 0.03}, {-0.03, 0.03}, {-0.03, 0.03},
    {-0.03, 0.03}, {-0.03, 0.03}, {-0.31, 0.20}, {-0.03, 0.03},

    { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18},
    { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18},
    { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18}, { 0.01,-0.18},

    {-0.39,-0.02}, {-0.39,-0.02}, {-0.35, 0.19}, {-0.39,-0.02},
    {-0.39,-0.02}, {-0.39,-0.02}, {-0.39,-0.02}, {-0.39,-0.02},
    {-0.39,-0.02}, {-0.39,-0.02}, {-0.39,-0.02}, {-0.39,-0.02},
  },

  rail_piece =
  {
    sprites =
    {
      layers =
      {
        util.sprite_load(
        "__elevated-rails__/graphics/entity/elevated-rail-signal/elevated-rail-signal-metals",
        {
          priority = "low",
          frame_count = 34,
          scale = 0.5,
        }),
        util.sprite_load(
        "__elevated-rails__/graphics/entity/elevated-rail-signal/elevated-rail-signal-shadow",
        {
          priority = "low",
          draw_as_shadow = true,
          shift = {4.13, 2.75}, -- a guess not based on anything that kind of works
          frame_count = 34,
          scale = 0.5,
        }),
      }
    },
    render_layer = "elevated-rail-stone-path-lower",
    align_to_frame_index =
    {
      --  X0Y0, X1Y0, X0Y1, X1Y1
      --  Left turn  | Straight/Multi |  Right turn
      00, 00, 00, 00,  00, 00, 00, 00,  00, 00, 00, 00, -- North
      01, 01, 01, 02,  01, 01, 01, 01,  03, 01, 01, 01,
      04, 04, 04, 04,  04, 04, 04, 04,  04, 04, 04, 04,
      07, 06, 05, 05,  05, 05, 05, 05,  05, 05, 05, 05,
      08, 08, 08, 08,  08, 08, 08, 08,  08, 08, 08, 08, -- East
      09, 09, 10, 09,  09, 09, 09, 09,  11, 12, 09, 09,
      13, 13, 13, 13,  13, 13, 13, 13,  13, 13, 13, 13,
      14, 16, 14, 14,  14, 14, 14, 14,  14, 14, 15, 14,
      17, 17, 17, 17,  17, 17, 17, 17,  17, 17, 17, 17, -- South
      19, 18, 18, 18,  18, 18, 18, 18,  18, 18, 18, 20,
      21, 21, 21, 21,  21, 21, 21, 21,  21, 21, 21, 21,
      22, 22, 22, 24,  22, 22, 22, 22,  22, 22, 23, 22,
      25, 25, 25, 25,  25, 25, 25, 25,  25, 25, 25, 25, -- West
      26, 26, 26, 27,  26, 26, 26, 26,  26, 26, 28, 26,
      29, 29, 29, 29,  29, 29, 29, 29,  29, 29, 29, 29,
      30, 30, 33, 30,  30, 30, 30, 30,  31, 32, 30, 30,
    }
  },

  lights =
  {
    green  = { light = {intensity = 0.2, size = 4, color={r=0, g=1,   b=0 }}, shift = { 0, -0.5 }},
    yellow = { light = {intensity = 0.2, size = 4, color={r=1, g=0.5, b=0 }}, shift = { 0,  0   }},
    red    = { light = {intensity = 0.2, size = 4, color={r=1, g=0,   b=0 }}, shift = { 0,  0.5 }},
  },
  circuit_connector = circuit_connector_definitions["elevated-rail-signal"],
  circuit_connector_render_layer = "elevated-rail-stone-path-lower",
}