{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:SPL35Q53Y6FSUT2WF6DGSKXN6Z","short_pith_number":"pith:SPL35Q53","schema_version":"1.0","canonical_sha256":"93d7bec3bbc78b2a4f562f86692aedf675a160e47a17100f4350462308966d56","source":{"kind":"arxiv","id":"1710.05394","version":2},"attestation_state":"computed","paper":{"title":"Estimating Phase Duration for SPaT Messages","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"stat.AP","authors_text":"Dileep Kalathil, Pravin Varaiya, Rene O. Sanchez, Shahana Ibrahim","submitted_at":"2017-10-15T20:15:27Z","abstract_excerpt":"A SPaT (Signal Phase and Timing) message describes for each lane the current phase at a signalized intersection together with an estimate of the residual time of that phase. Accurate SPaT messages can be used to construct a speed profile for a vehicle that reduces its fuel consumption as it approaches or leaves an intersection. This paper presents SPaT estimation algorithms at an intersection with a semi-actuated signal, using real-time signal phase measurements. The algorithms are evaluated using high-resolution data from two intersections in Montgomery County, MD. The algorithms can be readi"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1710.05394","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2017-10-15T20:15:27Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"abf2d21d04e66bae508c66cd1c56140b7cf600eac81cd7882d8948826e71f737","abstract_canon_sha256":"dae867e6ae7a08c07816039b4cb58e3082768410750b5e2dab630baa6cbfab17"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:14.378425Z","signature_b64":"Ni5OswlW1NN5XXBp+rnN+MpJ19aMqyAOvMRRpFciziWtQm610YapCkKtKWgi6aJ3Tlxk5dFXpjDwlxGrCQgHCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93d7bec3bbc78b2a4f562f86692aedf675a160e47a17100f4350462308966d56","last_reissued_at":"2026-05-18T00:26:14.377866Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:14.377866Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Estimating Phase Duration for SPaT Messages","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"stat.AP","authors_text":"Dileep Kalathil, Pravin Varaiya, Rene O. Sanchez, Shahana Ibrahim","submitted_at":"2017-10-15T20:15:27Z","abstract_excerpt":"A SPaT (Signal Phase and Timing) message describes for each lane the current phase at a signalized intersection together with an estimate of the residual time of that phase. Accurate SPaT messages can be used to construct a speed profile for a vehicle that reduces its fuel consumption as it approaches or leaves an intersection. This paper presents SPaT estimation algorithms at an intersection with a semi-actuated signal, using real-time signal phase measurements. The algorithms are evaluated using high-resolution data from two intersections in Montgomery County, MD. The algorithms can be readi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.05394","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1710.05394","created_at":"2026-05-18T00:26:14.377939+00:00"},{"alias_kind":"arxiv_version","alias_value":"1710.05394v2","created_at":"2026-05-18T00:26:14.377939+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.05394","created_at":"2026-05-18T00:26:14.377939+00:00"},{"alias_kind":"pith_short_12","alias_value":"SPL35Q53Y6FS","created_at":"2026-05-18T12:31:43.269735+00:00"},{"alias_kind":"pith_short_16","alias_value":"SPL35Q53Y6FSUT2W","created_at":"2026-05-18T12:31:43.269735+00:00"},{"alias_kind":"pith_short_8","alias_value":"SPL35Q53","created_at":"2026-05-18T12:31:43.269735+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z","json":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z.json","graph_json":"https://pith.science/api/pith-number/SPL35Q53Y6FSUT2WF6DGSKXN6Z/graph.json","events_json":"https://pith.science/api/pith-number/SPL35Q53Y6FSUT2WF6DGSKXN6Z/events.json","paper":"https://pith.science/paper/SPL35Q53"},"agent_actions":{"view_html":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z","download_json":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z.json","view_paper":"https://pith.science/paper/SPL35Q53","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1710.05394&json=true","fetch_graph":"https://pith.science/api/pith-number/SPL35Q53Y6FSUT2WF6DGSKXN6Z/graph.json","fetch_events":"https://pith.science/api/pith-number/SPL35Q53Y6FSUT2WF6DGSKXN6Z/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z/action/storage_attestation","attest_author":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z/action/author_attestation","sign_citation":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z/action/citation_signature","submit_replication":"https://pith.science/pith/SPL35Q53Y6FSUT2WF6DGSKXN6Z/action/replication_record"}},"created_at":"2026-05-18T00:26:14.377939+00:00","updated_at":"2026-05-18T00:26:14.377939+00:00"}