{"meta":{"generated":"2026-07-25","attribution":["Interstate, state-highway, arterial, rail, municipal-boundary, hydrography, and land-cover geometry derived from OpenStreetMap, © OpenStreetMap contributors, ODbL.","Boise city limit, Boise River, and the Boise arterial grid are reused directly from the Boise Civic Trust basemap, which derives its road network from Ada County street centrelines published by the Ada County Highway District (ACHD) and reconciles them against the statewide Idaho NG9-1-1 centreline dataset.","No alignment on this map is a proposed alignment. Every line shown is existing public infrastructure. The TVLR proposal names hub cities and a corridor, not station sites or a centreline."],"design":"The TVLR proposal fixes no centreline and names no station sites. It states that trunk lines run within or adjacent to the I-84 corridor, cites existing rail plus the I-84 right-of-way as the starting spine, and identifies hub cities by tier. This file therefore carries the real rights-of-way the proposal names and the hub cities it identifies — nothing drawn here is a proposed alignment."},"phases":[{"id":"phase-1","label":"Phase I","name":"Core spine — Boise → Meridian → Nampa","years":"Years 3–7","statedMiles":26,"statedCostUsd":{"low":3500000000,"mid":4500000000,"high":5500000000},"hubs":["boise","meridian","nampa"],"purpose":"Validate daily commuter volume, demonstrate transit-oriented development feasibility, and relieve the most-travelled corridor segment in the state.","rightsOfWay":[{"id":"p1-i84","kind":"freeway","name":"I-84 right-of-way","note":"The corridor §5.1 names as the primary alignment zone.","points":[[-116.21682,43.57144],[-116.22145,43.57194],[-116.23465,43.57196],[-116.23786,43.57256],[-116.28385,43.59473],[-116.28884,43.59615],[-116.29454,43.59705],[-116.34831,43.59715],[-116.35333,43.59658],[-116.36161,43.59441],[-116.36398,43.59399],[-116.37061,43.59338],[-116.43623,43.59334],[-116.44488,43.59368],[-116.48948,43.59875],[-116.49625,43.59928],[-116.50665,43.59948],[-116.52904,43.59827],[-116.54094,43.5981],[-116.54905,43.59844],[-116.558,43.59923]],"measuredMiles":17.6},{"id":"p1-rail","kind":"rail","name":"Boise Subdivision (Boise Valley Railroad)","note":"The operating rail corridor §2.4 cites as the existing-rail half of the starting spine.","points":[[-116.21385,43.60146],[-116.21973,43.60394],[-116.22222,43.60443],[-116.25195,43.60454],[-116.25912,43.60402],[-116.31564,43.60767],[-116.53131,43.61067],[-116.53467,43.61006],[-116.53719,43.60896],[-116.54201,43.60621],[-116.5432,43.60504],[-116.54382,43.6039],[-116.54402,43.60207],[-116.54324,43.5929],[-116.54316,43.57865],[-116.54373,43.57687],[-116.54514,43.57559],[-116.5473,43.5748],[-116.55008,43.57484],[-116.55286,43.57606]],"measuredMiles":19.2}]},{"id":"phase-2","label":"Phase II","name":"Expansion — Caldwell and Mountain Home","years":"Years 6–12","statedMiles":null,"statedCostUsd":{"low":1500000000,"mid":2000000000,"high":2500000000},"hubs":["caldwell","mountain-home"],"purpose":"Connect high-output freight regions to the spine and bring rural labour closer to industrial and commercial nodes, with freight-first routing.","rightsOfWay":[{"id":"p2-west-i84","kind":"freeway","name":"I-84 right-of-way — Nampa to Caldwell","points":[[-116.558,43.59923],[-116.57929,43.60115],[-116.5826,43.60174],[-116.5857,43.60279],[-116.58909,43.60433],[-116.59221,43.60641],[-116.61075,43.6202],[-116.6275,43.63127],[-116.64177,43.63938],[-116.64487,43.64158],[-116.64797,43.64488],[-116.65798,43.66054],[-116.6599,43.66247],[-116.66208,43.6637],[-116.67521,43.66895],[-116.68213,43.67347]],"measuredMiles":8.4},{"id":"p2-east-i84","kind":"freeway","name":"I-84 right-of-way — Boise to Mountain Home","points":[[-116.21682,43.57144],[-116.19937,43.56711],[-116.19564,43.56587],[-116.19235,43.56436],[-116.18882,43.56218],[-116.1633,43.54404],[-116.15982,43.54056],[-116.1567,43.53618],[-116.14553,43.5116],[-116.14307,43.50741],[-116.14002,43.50372],[-116.12453,43.4897],[-116.119,43.48564],[-116.11023,43.48022],[-116.10551,43.47649],[-116.0963,43.46676],[-116.06085,43.43358],[-116.05818,43.4317],[-116.03257,43.4173],[-116.03043,43.41587],[-116.02739,43.41318],[-115.94916,43.34076],[-115.78567,43.18868],[-115.7791,43.1841],[-115.77511,43.18188],[-115.771,43.17992],[-115.76423,43.17737],[-115.75533,43.17502],[-115.73533,43.1714],[-115.72083,43.1683],[-115.71593,43.16712],[-115.71165,43.16576],[-115.70168,43.16187],[-115.69372,43.15834],[-115.67913,43.15076],[-115.67436,43.14797]],"measuredMiles":40.9},{"id":"p2-east-rail","kind":"rail","name":"UP Nampa Subdivision","note":"The operating freight mainline toward Mountain Home.","points":[[-116.55322,43.57626],[-116.5365,43.56486],[-116.52894,43.55944],[-116.51822,43.5523],[-116.46316,43.5246],[-116.46153,43.52359],[-116.46011,43.52226],[-116.45926,43.52091],[-116.45303,43.50708],[-116.45147,43.5045],[-116.44209,43.49469],[-116.43903,43.49257],[-116.4373,43.49187],[-116.43525,43.49138],[-116.42662,43.49071],[-116.4236,43.49016],[-116.40218,43.48311],[-116.3988,43.48153],[-116.36867,43.46486],[-116.33332,43.45001],[-116.3282,43.44869],[-116.30878,43.44542],[-116.30502,43.44455],[-116.28352,43.43697],[-116.24198,43.42508],[-116.20264,43.41827],[-116.19739,43.41673],[-116.19451,43.41533],[-116.18937,43.41224],[-116.14569,43.3856],[-116.14314,43.38376],[-116.14055,43.38138],[-116.13815,43.37836],[-116.12547,43.35845],[-116.12221,43.35529],[-116.12,43.35388],[-115.84512,43.23677],[-115.84045,43.23389],[-115.83634,43.23034],[-115.81511,43.20501],[-115.81119,43.20096],[-115.77994,43.17782]],"measuredMiles":48.9}]},{"id":"phase-3","label":"Phase III","name":"Ontario feeder — feasibility study only","years":"Years 10–18","statedMiles":null,"statedCostUsd":null,"hubs":["ontario"],"studyOnly":true,"purpose":"Evaluate an eastern-Oregon connection. The proposal keeps this a decision gate, not a committed line: it requires a bi-state transit council and FRA interoperability review.","rightsOfWay":[{"id":"p3-i84","kind":"study","name":"I-84 right-of-way — Caldwell to Ontario","note":"The same public right-of-way the other phases use, carried across the Snake River into Oregon. Drawn as a study corridor because §2.4 keeps Ontario a decision gate, not a committed line.","points":[[-116.68213,43.67347],[-116.68649,43.67652],[-116.68844,43.67874],[-116.68955,43.68111],[-116.69079,43.68738],[-116.69638,43.69399],[-116.69825,43.69722],[-116.69924,43.70098],[-116.69975,43.70878],[-116.70051,43.71194],[-116.72307,43.77344],[-116.72511,43.77716],[-116.72716,43.77993],[-116.74799,43.80079],[-116.75041,43.80365],[-116.75273,43.80741],[-116.76093,43.82782],[-116.76714,43.85198],[-116.76884,43.8557],[-116.77096,43.85898],[-116.7731,43.86155],[-116.77745,43.86548],[-116.79201,43.87501],[-116.79678,43.8789],[-116.79951,43.88185],[-116.80187,43.88508],[-116.80884,43.89924],[-116.81273,43.90425],[-116.81567,43.90691],[-116.83548,43.92291],[-116.83958,43.92589],[-116.8434,43.92822],[-116.88911,43.95258],[-116.89328,43.95499],[-116.89998,43.95973],[-116.91811,43.97431],[-116.92351,43.97908],[-116.9271,43.98277],[-116.9308,43.98726],[-116.93368,43.99127],[-116.93657,43.99612],[-116.93887,44.00084],[-116.95099,44.02929]],"measuredMiles":28.9}]}],"hubs":[{"id":"boise","name":"Boise","tier":1,"phase":"phase-1","role":"Intermodal hub","centre":[-116.20089,43.61662],"i84":{"distanceAlongMiles":69.22,"offsetMiles":3.22,"point":[-116.21682,43.57144]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":160.2,"landUseMappedShare":0.319,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"commercial":89.5,"residential":52.3,"retail":18.5}}},{"id":"meridian","name":"Meridian","tier":1,"phase":"phase-1","role":"Intermodal hub","centre":[-116.39233,43.60863],"i84":{"distanceAlongMiles":59.88,"offsetMiles":1.05,"point":[-116.39261,43.59337]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":336.4,"landUseMappedShare":0.669,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"residential":150.3,"industrial":119.5,"commercial":53.3,"retail":13.3}}},{"id":"nampa","name":"Nampa","tier":2,"phase":"phase-1","role":"Park-and-ride + retail overlay","centre":[-116.56169,43.57804],"i84":{"distanceAlongMiles":51.57,"offsetMiles":1.48,"point":[-116.558,43.59923]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":411.8,"landUseMappedShare":0.819,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"residential":233.1,"commercial":79.6,"retail":65.2,"industrial":33.8}}},{"id":"caldwell","name":"Caldwell","tier":1,"phase":"phase-2","role":"Intermodal + freight hub","centre":[-116.68941,43.66787],"i84":{"distanceAlongMiles":43.16,"offsetMiles":0.53,"point":[-116.68213,43.67348]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":384.6,"landUseMappedShare":0.765,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"residential":199.2,"commercial":76.7,"industrial":58.9,"retail":49.9}}},{"id":"mountain-home","name":"Mountain Home","tier":2,"phase":"phase-2","role":"Park-and-ride + freight staging","centre":[-115.69398,43.13189],"i84":{"distanceAlongMiles":110.16,"offsetMiles":1.49,"point":[-115.67436,43.14797]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":40.6,"landUseMappedShare":0.081,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"residential":40.6}}},{"id":"ontario","name":"Ontario","tier":3,"phase":"phase-3","role":"Bi-state feeder — feasibility study, not a committed line","centre":[-116.96294,44.02655],"i84":{"distanceAlongMiles":14.22,"offsetMiles":0.62,"point":[-116.95099,44.02929]},"catchment":{"radiusMiles":0.5,"totalAcres":502.7,"landUseMappedAcres":70,"landUseMappedShare":0.139,"coverageCaveat":"OpenStreetMap land-use coverage is a lower bound on developed land, and is weakest over dense downtown cores.","mixAcres":{"commercial":35.2,"industrial":28.3,"residential":6.5}}}]}