{
  "generated_by": "07_build_western_suburbs_scats_tirtl_map_data.py",
  "summary": {
    "suburbs": [
      "Yarraville",
      "Seddon",
      "Spotswood",
      "Kensington"
    ],
    "scats_site_count": 42,
    "tirtl_site_count": 2,
    "scats_site_count_by_suburb": {
      "Yarraville": 19,
      "Seddon": 1,
      "Spotswood": 7,
      "Kensington": 15
    },
    "tirtl_total_trucks_change": -162295,
    "tirtl_total_vehicles_change": -469718,
    "framing": "SCATS markers show local signal-site traffic. TIRTL markers show West Gate Bridge corridor truck, vehicle and speed behaviour as a regional freight reference."
  },
  "scats_sites": [
    {
      "source": "SCATS",
      "site": 1064,
      "site_id": 1064,
      "name": "Racecourse / Western Link On / Off Ramps",
      "official": "RACECOURSE/WESTERN LINK ON/OFF RAMPS",
      "suburb": "Kensington",
      "lat": -37.789208,
      "lng": 144.937434,
      "rank": 691,
      "historical_total": 203195052,
      "traffic_band": "orange",
      "period_a_volume": 2350723,
      "period_b_volume": 2291002,
      "change_volume": -59721,
      "pct_change": -2.54,
      "color": "#fc8d59",
      "radius": 18.5,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.789208,144.937434",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2500,
      "site_id": 2500,
      "name": "Racecourse / Smithfield",
      "official": "RACECOURSE/SMITHFIELD",
      "suburb": "Kensington",
      "lat": -37.787694,
      "lng": 144.925212,
      "rank": 525,
      "historical_total": 223431577,
      "traffic_band": "orange",
      "period_a_volume": 3009329,
      "period_b_volume": 2776622,
      "change_volume": -232707,
      "pct_change": -7.73,
      "color": "#fc8d59",
      "radius": 18.7,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.787694,144.925212",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2501,
      "site_id": 2501,
      "name": "Princes Hwy West(Smithfield) / Epsom",
      "official": "PRINCES HWY WEST(SMITHFIELD)/EPSOM",
      "suburb": "Kensington",
      "lat": -37.789148,
      "lng": 144.922922,
      "rank": 927,
      "historical_total": 180170992,
      "traffic_band": "orange",
      "period_a_volume": 2460864,
      "period_b_volume": 2317949,
      "change_volume": -142915,
      "pct_change": -5.81,
      "color": "#fc8d59",
      "radius": 18.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.789148,144.922922",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2502,
      "site_id": 2502,
      "name": "Smithfield / Gatehouse / Streetables",
      "official": "SMITHFIELD/GATEHOUSE/STABLES",
      "suburb": "Kensington",
      "lat": -37.791072,
      "lng": 144.91982,
      "rank": 633,
      "historical_total": 208380484,
      "traffic_band": "orange",
      "period_a_volume": 4051862,
      "period_b_volume": 3643192,
      "change_volume": -408670,
      "pct_change": -10.09,
      "color": "#d73027",
      "radius": 18.6,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.791072,144.91982",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2524,
      "site_id": 2524,
      "name": "EPSOM near BANGALORE",
      "official": "EPSOM NR BANGALORE",
      "suburb": "Kensington",
      "lat": -37.793053,
      "lng": 144.92667,
      "rank": 1852,
      "historical_total": 117944967,
      "traffic_band": "yellow",
      "period_a_volume": 1798439,
      "period_b_volume": 1769103,
      "change_volume": -29336,
      "pct_change": -1.63,
      "color": "#fc8d59",
      "radius": 17.4,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.793053,144.92667",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2939,
      "site_id": 2939,
      "name": "Racecourse / Newmarket",
      "official": "RACECOURSE/NEWMARKET",
      "suburb": "Kensington",
      "lat": -37.788048,
      "lng": 144.928459,
      "rank": 1189,
      "historical_total": 156403832,
      "traffic_band": "yellow",
      "period_a_volume": 2233562,
      "period_b_volume": 2145442,
      "change_volume": -88120,
      "pct_change": -3.95,
      "color": "#fc8d59",
      "radius": 18.0,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.788048,144.928459",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3403,
      "site_id": 3403,
      "name": "Kensington Road / Altona Street",
      "official": "KENSINGTON RD/ALTONA ST",
      "suburb": "Kensington",
      "lat": -37.795938,
      "lng": 144.924546,
      "rank": 3880,
      "historical_total": 35115716,
      "traffic_band": "green",
      "period_a_volume": 552426,
      "period_b_volume": 549557,
      "change_volume": -2869,
      "pct_change": -0.52,
      "color": "#fc8d59",
      "radius": 14.7,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.795938,144.924546",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3404,
      "site_id": 3404,
      "name": "Kensington / Hobsons / Childers",
      "official": "KENSINGTON/HOBSONS/CHILDERS",
      "suburb": "Kensington",
      "lat": -37.798493,
      "lng": 144.920111,
      "rank": 3633,
      "historical_total": 46258964,
      "traffic_band": "green",
      "period_a_volume": 731309,
      "period_b_volume": 723012,
      "change_volume": -8297,
      "pct_change": -1.13,
      "color": "#fc8d59",
      "radius": 15.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.798493,144.920111",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3436,
      "site_id": 3436,
      "name": "KENSINGTON near DEVON",
      "official": "KENSINGTON NR DEVON",
      "suburb": "Kensington",
      "lat": -37.796843,
      "lng": 144.922975,
      "rank": 3957,
      "historical_total": 31684336,
      "traffic_band": "green",
      "period_a_volume": 513738,
      "period_b_volume": 515355,
      "change_volume": 1617,
      "pct_change": 0.31,
      "color": "#fee08b",
      "radius": 14.5,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.796843,144.922975",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3764,
      "site_id": 3764,
      "name": "Arden / Lloyd",
      "official": "ARDEN/LLOYD",
      "suburb": "Kensington",
      "lat": -37.799287,
      "lng": 144.935122,
      "rank": 3294,
      "historical_total": 59711263,
      "traffic_band": "green",
      "period_a_volume": 1064692,
      "period_b_volume": 1038812,
      "change_volume": -25880,
      "pct_change": -2.43,
      "color": "#fc8d59",
      "radius": 15.9,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.799287,144.935122",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3989,
      "site_id": 3989,
      "name": "Bakehouse Dr / Lloyd Street",
      "official": "BAKEHOUSE DR / LLOYD ST",
      "suburb": "Kensington",
      "lat": -37.800588,
      "lng": 144.932934,
      "rank": 3606,
      "historical_total": 47554871,
      "traffic_band": "green",
      "period_a_volume": 717465,
      "period_b_volume": 700579,
      "change_volume": -16886,
      "pct_change": -2.35,
      "color": "#fc8d59",
      "radius": 15.4,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.800588,144.932934",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4469,
      "site_id": 4469,
      "name": "RACECOURSE near CROWN",
      "official": "RACECOURSE NR CROWN",
      "suburb": "Kensington",
      "lat": -37.787419,
      "lng": 144.922122,
      "rank": 3054,
      "historical_total": 70537198,
      "traffic_band": "green",
      "period_a_volume": 4639925,
      "period_b_volume": 4769443,
      "change_volume": 129518,
      "pct_change": 2.79,
      "color": "#fee08b",
      "radius": 16.2,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.787419,144.922122",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4480,
      "site_id": 4480,
      "name": "Macaulay / Epsom / Kensington",
      "official": "MACAULAY/EPSOM/KENSINGTON",
      "suburb": "Kensington",
      "lat": -37.794139,
      "lng": 144.927699,
      "rank": 3095,
      "historical_total": 68414211,
      "traffic_band": "green",
      "period_a_volume": 910802,
      "period_b_volume": 898408,
      "change_volume": -12394,
      "pct_change": -1.36,
      "color": "#fc8d59",
      "radius": 16.2,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.794139,144.927699",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4481,
      "site_id": 4481,
      "name": "MACAULAY near BELLAIR",
      "official": "MACAULAY NR BELLAIR",
      "suburb": "Kensington",
      "lat": -37.794441,
      "lng": 144.930176,
      "rank": 3468,
      "historical_total": 53017024,
      "traffic_band": "green",
      "period_a_volume": 487424,
      "period_b_volume": 473790,
      "change_volume": -13634,
      "pct_change": -2.8,
      "color": "#fc8d59",
      "radius": 15.6,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.794441,144.930176",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4484,
      "site_id": 4484,
      "name": "Macaulay / Streetubbs",
      "official": "MACAULAY/STUBBS",
      "suburb": "Kensington",
      "lat": -37.794975,
      "lng": 144.93486,
      "rank": 2139,
      "historical_total": 106271535,
      "traffic_band": "yellow",
      "period_a_volume": 2183450,
      "period_b_volume": 1826312,
      "change_volume": -357138,
      "pct_change": -16.36,
      "color": "#d73027",
      "radius": 17.1,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.794975,144.93486",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4249,
      "site_id": 4249,
      "name": "Williamstown / Charles / Dickson",
      "official": "WILLIAMSTOWN/CHARLES/DICKSON",
      "suburb": "Seddon",
      "lat": -37.805829,
      "lng": 144.88481,
      "rank": 2274,
      "historical_total": 101195791,
      "traffic_band": "yellow",
      "period_a_volume": 1450793,
      "period_b_volume": 1389527,
      "change_volume": -61266,
      "pct_change": -4.22,
      "color": "#fc8d59",
      "radius": 17.0,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.805829,144.88481",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 1303,
      "site_id": 1303,
      "name": "Melbourne Road / The Avenue",
      "official": "MELBOURNE ROAD/THE AVENUE",
      "suburb": "Spotswood",
      "lat": -37.827225,
      "lng": 144.88108,
      "rank": 1277,
      "historical_total": 150652422,
      "traffic_band": "yellow",
      "period_a_volume": 2333944,
      "period_b_volume": 2261112,
      "change_volume": -72832,
      "pct_change": -3.12,
      "color": "#fc8d59",
      "radius": 17.9,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.827225,144.88108",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2260,
      "site_id": 2260,
      "name": "Melbourne Road / Mclister Street / Birmingham Street",
      "official": "Melbourne Road/Mclister Street/Birmingham Street",
      "suburb": "Spotswood",
      "lat": -37.83098,
      "lng": 144.881554,
      "rank": 4085,
      "historical_total": 25043727,
      "traffic_band": "green",
      "period_a_volume": 1842177,
      "period_b_volume": 1800615,
      "change_volume": -41562,
      "pct_change": -2.26,
      "color": "#fc8d59",
      "radius": 14.0,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.83098,144.881554",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2880,
      "site_id": 2880,
      "name": "Westgate Freeway / Williamstown",
      "official": "WESTGATE FWY/WILLIAMSTOWN",
      "suburb": "Spotswood",
      "lat": -37.825989,
      "lng": 144.88096,
      "rank": 160,
      "historical_total": 314785178,
      "traffic_band": "red",
      "period_a_volume": 4679003,
      "period_b_volume": 4356061,
      "change_volume": -322942,
      "pct_change": -6.9,
      "color": "#fc8d59",
      "radius": 19.5,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.825989,144.88096",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3431,
      "site_id": 3431,
      "name": "Hyde / Francis",
      "official": "HYDE/FRANCIS",
      "suburb": "Spotswood",
      "lat": -37.821797,
      "lng": 144.895857,
      "rank": 2357,
      "historical_total": 97624452,
      "traffic_band": "green",
      "period_a_volume": 1254876,
      "period_b_volume": 1092065,
      "change_volume": -162811,
      "pct_change": -12.97,
      "color": "#d73027",
      "radius": 16.9,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.821797,144.895857",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3438,
      "site_id": 3438,
      "name": "Francis / Whitehall",
      "official": "FRANCIS/WHITEHALL",
      "suburb": "Spotswood",
      "lat": -37.822079,
      "lng": 144.898375,
      "rank": 3503,
      "historical_total": 51496622,
      "traffic_band": "green",
      "period_a_volume": 682081,
      "period_b_volume": 578081,
      "change_volume": -104000,
      "pct_change": -15.25,
      "color": "#d73027",
      "radius": 15.6,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.822079,144.898375",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3901,
      "site_id": 3901,
      "name": "Melbourne / Vic Track Maintenance Facility Access",
      "official": "MELBOURNE/VIC TRACK MAINTENANCE FACILITY ACCESS",
      "suburb": "Spotswood",
      "lat": -37.83258,
      "lng": 144.88179,
      "rank": 1806,
      "historical_total": 119560323,
      "traffic_band": "yellow",
      "period_a_volume": 1767510,
      "period_b_volume": 1716898,
      "change_volume": -50612,
      "pct_change": -2.86,
      "color": "#fc8d59",
      "radius": 17.4,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.83258,144.88179",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4965,
      "site_id": 4965,
      "name": "Melbourne / Hudsons",
      "official": "MELBOURNE/HUDSONS",
      "suburb": "Spotswood",
      "lat": -37.82925,
      "lng": 144.881348,
      "rank": 1464,
      "historical_total": 139272464,
      "traffic_band": "yellow",
      "period_a_volume": 2045794,
      "period_b_volume": 1983778,
      "change_volume": -62016,
      "pct_change": -3.03,
      "color": "#fc8d59",
      "radius": 17.7,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.82925,144.881348",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 1587,
      "site_id": 1587,
      "name": "Fogarty Avenue near Wembley Avenue",
      "official": "Fogarty Avenue NR Wembley Avenue",
      "suburb": "Yarraville",
      "lat": -37.823914,
      "lng": 144.871201,
      "rank": 4454,
      "historical_total": 5750299,
      "traffic_band": "green",
      "period_a_volume": 238557,
      "period_b_volume": 214404,
      "change_volume": -24153,
      "pct_change": -10.12,
      "color": "#d73027",
      "radius": 10.8,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.823914,144.871201",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 1930,
      "site_id": 1930,
      "name": "Hyde Street nr Leek Street",
      "official": "Hyde Street nr Leek Street",
      "suburb": "Yarraville",
      "lat": -37.817431,
      "lng": 144.896639,
      "rank": 4160,
      "historical_total": 20828082,
      "traffic_band": "green",
      "period_a_volume": 520269,
      "period_b_volume": 476914,
      "change_volume": -43355,
      "pct_change": -8.33,
      "color": "#fc8d59",
      "radius": 13.6,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.817431,144.896639",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2517,
      "site_id": 2517,
      "name": "WHITEHALL near HALL",
      "official": "WHITEHALL NR HALL",
      "suburb": "Yarraville",
      "lat": -37.816923,
      "lng": 144.899289,
      "rank": 3653,
      "historical_total": 45351530,
      "traffic_band": "green",
      "period_a_volume": 318658,
      "period_b_volume": 215626,
      "change_volume": -103032,
      "pct_change": -32.33,
      "color": "#d73027",
      "radius": 15.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.816923,144.899289",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 2519,
      "site_id": 2519,
      "name": "Princes Hwy West / Cemetery",
      "official": "PRINCES HWY WEST/CEMETERY",
      "suburb": "Yarraville",
      "lat": -37.813816,
      "lng": 144.859834,
      "rank": 578,
      "historical_total": 215149880,
      "traffic_band": "orange",
      "period_a_volume": 3196326,
      "period_b_volume": 2866575,
      "change_volume": -329751,
      "pct_change": -10.32,
      "color": "#d73027",
      "radius": 18.7,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.813816,144.859834",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3429,
      "site_id": 3429,
      "name": "WHITEHALL near FREDERICK",
      "official": "WHITEHALL NR FREDERICK",
      "suburb": "Yarraville",
      "lat": -37.820081,
      "lng": 144.89873,
      "rank": 3431,
      "historical_total": 54483807,
      "traffic_band": "green",
      "period_a_volume": 666550,
      "period_b_volume": 599554,
      "change_volume": -66996,
      "pct_change": -10.05,
      "color": "#d73027",
      "radius": 15.7,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.820081,144.89873",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3430,
      "site_id": 3430,
      "name": "Somerville / Hyde",
      "official": "SOMERVILLE/HYDE",
      "suburb": "Yarraville",
      "lat": -37.814375,
      "lng": 144.897177,
      "rank": 4524,
      "historical_total": 2319926,
      "traffic_band": "green",
      "period_a_volume": 905417,
      "period_b_volume": 817543,
      "change_volume": -87874,
      "pct_change": -9.71,
      "color": "#fc8d59",
      "radius": 8.8,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.814375,144.897177",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3432,
      "site_id": 3432,
      "name": "FRANCIS near BALLARAT",
      "official": "FRANCIS NR BALLARAT",
      "suburb": "Yarraville",
      "lat": -37.821167,
      "lng": 144.890213,
      "rank": 3037,
      "historical_total": 71105038,
      "traffic_band": "green",
      "period_a_volume": 900556,
      "period_b_volume": 730851,
      "change_volume": -169705,
      "pct_change": -18.84,
      "color": "#d73027",
      "radius": 16.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.821167,144.890213",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3435,
      "site_id": 3435,
      "name": "Whitehall / Somerville",
      "official": "WHITEHALL/SOMERVILLE",
      "suburb": "Yarraville",
      "lat": -37.814665,
      "lng": 144.899771,
      "rank": 2975,
      "historical_total": 73145706,
      "traffic_band": "green",
      "period_a_volume": 1032357,
      "period_b_volume": 861077,
      "change_volume": -171280,
      "pct_change": -16.59,
      "color": "#d73027",
      "radius": 16.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.814665,144.899771",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3486,
      "site_id": 3486,
      "name": "Williamstown / Shopping Centre Ent",
      "official": "WILLIAMSTOWN/SHOPPING CENTRE ENT",
      "suburb": "Yarraville",
      "lat": -37.816951,
      "lng": 144.882679,
      "rank": 1920,
      "historical_total": 115272885,
      "traffic_band": "yellow",
      "period_a_volume": 1556667,
      "period_b_volume": 1520455,
      "change_volume": -36212,
      "pct_change": -2.33,
      "color": "#fc8d59",
      "radius": 17.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.816951,144.882679",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3487,
      "site_id": 3487,
      "name": "WILLIAMSTOWN near THOMAS",
      "official": "WILLIAMSTOWN NR THOMAS",
      "suburb": "Yarraville",
      "lat": -37.823449,
      "lng": 144.881437,
      "rank": 663,
      "historical_total": 205724720,
      "traffic_band": "orange",
      "period_a_volume": 2858580,
      "period_b_volume": 2482554,
      "change_volume": -376026,
      "pct_change": -13.15,
      "color": "#d73027",
      "radius": 18.6,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.823449,144.881437",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 3753,
      "site_id": 3753,
      "name": "WILLIAMSTOWN near WEBB",
      "official": "WILLIAMSTOWN NR WEBB",
      "suburb": "Yarraville",
      "lat": -37.809216,
      "lng": 144.884162,
      "rank": 2467,
      "historical_total": 92925968,
      "traffic_band": "green",
      "period_a_volume": 1339675,
      "period_b_volume": 1301311,
      "change_volume": -38364,
      "pct_change": -2.86,
      "color": "#fc8d59",
      "radius": 16.8,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.809216,144.884162",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4229,
      "site_id": 4229,
      "name": "SOMERVILLE near POWELL",
      "official": "SOMERVILLE NR POWELL",
      "suburb": "Yarraville",
      "lat": -37.813047,
      "lng": 144.885429,
      "rank": 4185,
      "historical_total": 19689501,
      "traffic_band": "green",
      "period_a_volume": 323099,
      "period_b_volume": 293775,
      "change_volume": -29324,
      "pct_change": -9.08,
      "color": "#fc8d59",
      "radius": 13.5,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.813047,144.885429",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4230,
      "site_id": 4230,
      "name": "Williamstown / Francis",
      "official": "WILLIAMSTOWN/FRANCIS",
      "suburb": "Yarraville",
      "lat": -37.820265,
      "lng": 144.882132,
      "rank": 940,
      "historical_total": 177725554,
      "traffic_band": "yellow",
      "period_a_volume": 2406604,
      "period_b_volume": 2254180,
      "change_volume": -152424,
      "pct_change": -6.33,
      "color": "#fc8d59",
      "radius": 18.2,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.820265,144.882132",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4251,
      "site_id": 4251,
      "name": "Williamstown / Somerville",
      "official": "WILLIAMSTOWN/SOMERVILLE",
      "suburb": "Yarraville",
      "lat": -37.812825,
      "lng": 144.883466,
      "rank": 1159,
      "historical_total": 159141960,
      "traffic_band": "yellow",
      "period_a_volume": 1586071,
      "period_b_volume": 1882383,
      "change_volume": 296312,
      "pct_change": 18.68,
      "color": "#91cf60",
      "radius": 18.0,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.812825,144.883466",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4254,
      "site_id": 4254,
      "name": "Francis / Wembley",
      "official": "FRANCIS/WEMBLEY",
      "suburb": "Yarraville",
      "lat": -37.819346,
      "lng": 144.874072,
      "rank": 2957,
      "historical_total": 73554829,
      "traffic_band": "green",
      "period_a_volume": 3700545,
      "period_b_volume": 2758983,
      "change_volume": -941562,
      "pct_change": -25.44,
      "color": "#d73027",
      "radius": 16.3,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.819346,144.874072",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4255,
      "site_id": 4255,
      "name": "FRANCIS / Stephen",
      "official": "FRANCIS/STEPHEN",
      "suburb": "Yarraville",
      "lat": -37.821524,
      "lng": 144.893412,
      "rank": 3201,
      "historical_total": 64433795,
      "traffic_band": "green",
      "period_a_volume": 848158,
      "period_b_volume": 686774,
      "change_volume": -161384,
      "pct_change": -19.03,
      "color": "#d73027",
      "radius": 16.0,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.821524,144.893412",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4257,
      "site_id": 4257,
      "name": "Williamstown / Anderson",
      "official": "WILLIAMSTOWN/ANDERSON",
      "suburb": "Yarraville",
      "lat": -37.815788,
      "lng": 144.882901,
      "rank": 1847,
      "historical_total": 118194791,
      "traffic_band": "yellow",
      "period_a_volume": 1633468,
      "period_b_volume": 1601912,
      "change_volume": -31556,
      "pct_change": -1.93,
      "color": "#fc8d59",
      "radius": 17.4,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.815788,144.882901",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 4258,
      "site_id": 4258,
      "name": "WILLIAMSTOWN near CASTLE",
      "official": "WILLIAMSTOWN NR CASTLE",
      "suburb": "Yarraville",
      "lat": -37.818134,
      "lng": 144.882452,
      "rank": 2037,
      "historical_total": 110388676,
      "traffic_band": "yellow",
      "period_a_volume": 1535202,
      "period_b_volume": 1509623,
      "change_volume": -25579,
      "pct_change": -1.67,
      "color": "#fc8d59",
      "radius": 17.2,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.818134,144.882452",
      "role": "local SCATS signal-site traffic"
    },
    {
      "source": "SCATS",
      "site": 8521,
      "site_id": 8521,
      "name": "Hyde Street / Leek Street",
      "official": "Hyde Street/Leek Street",
      "suburb": "Yarraville",
      "lat": -37.817339,
      "lng": 144.896658,
      "rank": 4457,
      "historical_total": 5656625,
      "traffic_band": "green",
      "period_a_volume": 0,
      "period_b_volume": 0,
      "change_volume": 0,
      "pct_change": null,
      "color": "#667085",
      "radius": 10.8,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.817339,144.896658",
      "role": "local SCATS signal-site traffic"
    }
  ],
  "tirtl_sites": [
    {
      "source": "TIRTL",
      "tirtl_site_id": "WGB_INBOUND_E",
      "source_site": null,
      "name": "West Gate Bridge inbound E",
      "direction": "inbound",
      "heading": "E",
      "lat": -37.8309,
      "lng": 144.900501,
      "role": "regional corridor freight reference",
      "corridor_name": "West Gate Bridge",
      "vehicles_a": 5322152,
      "vehicles_b": 5091649,
      "vehicles_change": -230503,
      "vehicles_pct_change": -4.33,
      "trucks_a": 900474,
      "trucks_b": 835963,
      "trucks_change": -64511,
      "trucks_pct_change": -7.16,
      "truck_share_a_pct": 16.92,
      "truck_share_b_pct": 16.42,
      "truck_share_point_change": -0.5,
      "avg_speed_a_kmh": 65.2,
      "avg_speed_b_kmh": 68.99,
      "avg_speed_change_kmh": 3.79,
      "period_a_label": "Nov-Dec 2025",
      "period_b_label": "Jan-Feb 2026",
      "color": "#0047ab",
      "radius": 13,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.8309,144.900501",
      "interpretation": "West Gate Bridge corridor truck volumes decreased in the comparison period."
    },
    {
      "source": "TIRTL",
      "tirtl_site_id": "WGB_OUTBOUND_W",
      "source_site": null,
      "name": "West Gate Bridge outbound W",
      "direction": "outbound",
      "heading": "W",
      "lat": -37.830815,
      "lng": 144.900329,
      "role": "regional corridor freight reference",
      "corridor_name": "West Gate Bridge",
      "vehicles_a": 5622671,
      "vehicles_b": 5383456,
      "vehicles_change": -239215,
      "vehicles_pct_change": -4.25,
      "trucks_a": 947330,
      "trucks_b": 849546,
      "trucks_change": -97784,
      "trucks_pct_change": -10.32,
      "truck_share_a_pct": 16.85,
      "truck_share_b_pct": 15.78,
      "truck_share_point_change": -1.07,
      "avg_speed_a_kmh": 65.97,
      "avg_speed_b_kmh": 70.53,
      "avg_speed_change_kmh": 4.56,
      "period_a_label": "Nov-Dec 2025",
      "period_b_label": "Jan-Feb 2026",
      "color": "#0047ab",
      "radius": 13,
      "url": "https://www.google.com/maps/search/?api=1&query=-37.830815,144.900329",
      "interpretation": "West Gate Bridge corridor truck volumes decreased in the comparison period."
    }
  ]
}