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            "id": "p15.1",
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            "bbox": {
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            "text": "LEVEL OF SERVICE\nFOR\nSIGNALIZED INTERSECTIONS [p15.1.1]",
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                "block_label": "figure_title"
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            "children": [
                {
                    "id": "p15.1.1",
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                    "text": "¹",
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            "text": "",
            "attrs": {
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                "n_rows": 7,
                "n_cols": 3
            },
            "children": [
                {
                    "id": "p15.2.1",
                    "order": 4,
                    "type": "table_cell",
                    "bbox": {
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                    "text": "level of Service",
                    "attrs": {
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                        "rowspan": 1,
                        "colspan": 1,
                        "column_header": true,
                        "header_source": "heuristic"
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                },
                {
                    "id": "p15.2.2",
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                    "text": "Description",
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                        "column_header": true,
                        "header_source": "heuristic"
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                },
                {
                    "id": "p15.2.3",
                    "order": 6,
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                    "bbox": {
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                    "text": "Control (Signal) Delay Per Vehicle (Seconds)",
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                        "column_header": true,
                        "header_source": "heuristic"
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                },
                {
                    "id": "p15.2.4",
                    "order": 7,
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                    "text": "A",
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                },
                {
                    "id": "p15.2.5",
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                    "text": "Very short delay, good progression; most vehicles do not stop at intersection.",
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                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.6",
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                    "text": "≤10.0",
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                },
                {
                    "id": "p15.2.7",
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                    "text": "B",
                    "attrs": {
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                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.8",
                    "order": 11,
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                    "text": "Generally good progression and/or short cycle length; more vehicles stop at intersection than at Level of Service “A.”",
                    "attrs": {
                        "row": 2,
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                        "rowspan": 1,
                        "colspan": 1
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                },
                {
                    "id": "p15.2.9",
                    "order": 12,
                    "type": "table_cell",
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                    "text": ">10.0 and ≤20.0",
                    "attrs": {
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                        "rowspan": 1,
                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.10",
                    "order": 13,
                    "type": "table_cell",
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                    },
                    "text": "C",
                    "attrs": {
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                        "col": 0,
                        "rowspan": 1,
                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.11",
                    "order": 14,
                    "type": "table_cell",
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                    "text": "Fair progression and/or longer cycle length; significant number of vehicles stop at intersection, though many still pass through without stopping.",
                    "attrs": {
                        "row": 3,
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                        "rowspan": 1,
                        "colspan": 1
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                },
                {
                    "id": "p15.2.12",
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                    "text": ">20.0 and ≤35.0",
                    "attrs": {
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                        "rowspan": 1,
                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.13",
                    "order": 16,
                    "type": "table_cell",
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                    "text": "D",
                    "attrs": {
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                },
                {
                    "id": "p15.2.14",
                    "order": 17,
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                    "text": "Congestion becomes noticeable; longer delays from unfavorable progression, long cycle lengths, or high volume/capacity ratios; many vehicles stop at intersection.",
                    "attrs": {
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                        "rowspan": 1,
                        "colspan": 1
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                },
                {
                    "id": "p15.2.15",
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                    "text": ">35.0 and ≤55.0",
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                        "colspan": 1
                    }
                },
                {
                    "id": "p15.2.16",
                    "order": 19,
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                    "text": "E",
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                },
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                    "id": "p15.2.17",
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                    "text": "Considered to be the limit of acceptable delay; indicative of poor progression, long cycle lengths, or high volume/capacity ratios; frequent individual cycles failures.",
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                        "rowspan": 1,
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                {
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                    "text": ">55.0 and ≤80.0",
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                },
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                    "text": "F",
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                },
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                    "text": "Often an indication of over-saturation (i.e., arrival flow exceeds capacity); also caused by poor progression and long cycles lengths; capacity is not necessarily exceeded under this level of service.",
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                },
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                    "text": ">80.0",
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            "text": "[p15.4.1] Transportation Research Board, Highway Capacity Manual 2022, National Research Council, Washington, DC, 2022.",
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                    "text": "¹",
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