{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DDN2USZPDBEDTDYDZGHVDLUYYB","short_pith_number":"pith:DDN2USZP","canonical_record":{"source":{"id":"1511.05363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-11-17T11:59:30Z","cross_cats_sorted":["cs.SE"],"title_canon_sha256":"9cbba521212abe5c24893cea539a265ddc9be6cddd3008e615ec5efbbd1ab50e","abstract_canon_sha256":"d1747b60755bc538a7c657e0e852dca6e1bf0b08e25c0528dc29dd680231ef30"},"schema_version":"1.0"},"canonical_sha256":"18dbaa4b2f1848398f03c98f51ae98c0513d9ee546a73f0f24d1f1b7ec221e28","source":{"kind":"arxiv","id":"1511.05363","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.05363","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"arxiv_version","alias_value":"1511.05363v1","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.05363","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"pith_short_12","alias_value":"DDN2USZPDBED","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DDN2USZPDBEDTDYD","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DDN2USZP","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DDN2USZPDBEDTDYDZGHVDLUYYB","target":"record","payload":{"canonical_record":{"source":{"id":"1511.05363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-11-17T11:59:30Z","cross_cats_sorted":["cs.SE"],"title_canon_sha256":"9cbba521212abe5c24893cea539a265ddc9be6cddd3008e615ec5efbbd1ab50e","abstract_canon_sha256":"d1747b60755bc538a7c657e0e852dca6e1bf0b08e25c0528dc29dd680231ef30"},"schema_version":"1.0"},"canonical_sha256":"18dbaa4b2f1848398f03c98f51ae98c0513d9ee546a73f0f24d1f1b7ec221e28","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:40.509175Z","signature_b64":"I00afHOZotJWFHD3bG1Euco/OdbyQtK2Uy1m6iKigo+LR8lZVmjPZHIdToJfemlFhSNHOPpixQ15A30ss03aDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18dbaa4b2f1848398f03c98f51ae98c0513d9ee546a73f0f24d1f1b7ec221e28","last_reissued_at":"2026-05-18T01:26:40.508382Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:40.508382Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.05363","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:26:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97aHi+x4spyx0f3NTvwqLAYmBkZlWoauf+8WJVSWEJNT6YbMYinboLXmZGoSTMeoB51Wv6K4c6m3mY0xUEZ6Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:10:09.900385Z"},"content_sha256":"7f2bb22f74480719a3be82c0d8251ebdb1ec47461b28ee73f16c0997594f858d","schema_version":"1.0","event_id":"sha256:7f2bb22f74480719a3be82c0d8251ebdb1ec47461b28ee73f16c0997594f858d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DDN2USZPDBEDTDYDZGHVDLUYYB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probabilistic Modelling of the Impact on Bus Punctuality of a Speed Limit Proposal in Edinburgh (Extended Version)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SE"],"primary_cat":"cs.CY","authors_text":"Dani\\\"el Reijsbergen, Rajeev Ratan","submitted_at":"2015-11-17T11:59:30Z","abstract_excerpt":"We propose a data-driven methodology for evaluating the impact of the introduction of a speed limit on the punctuality of bus services. In particular, we use high-frequency Automatic Vehicle Location data to parameterise a model that represents the movement of a bus along predefined patches of the route. We fit the probability distributions of the time spent in each patch to two classes of probability distributions: hyper-Erlang distributions, for which we use the tool HyperStar, and a variation of the three-parameter gamma distributions recommended by the Traffic Engineering Handbook. In both"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.05363","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:26:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i8x+Q0G3mJrU85tibnoJX13voAsXkjM+AYGbLVDhbDb3izCpJ4vGasenNWdg76J+VnChp4qbPbVxgFte/UpfBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:10:09.901076Z"},"content_sha256":"427bd6c66aae13e271ace02bcd6ed5af0a6610d2d697e6793c795a44e63bda49","schema_version":"1.0","event_id":"sha256:427bd6c66aae13e271ace02bcd6ed5af0a6610d2d697e6793c795a44e63bda49"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/bundle.json","state_url":"https://pith.science/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T17:10:09Z","links":{"resolver":"https://pith.science/pith/DDN2USZPDBEDTDYDZGHVDLUYYB","bundle":"https://pith.science/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/bundle.json","state":"https://pith.science/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DDN2USZPDBEDTDYDZGHVDLUYYB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DDN2USZPDBEDTDYDZGHVDLUYYB","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d1747b60755bc538a7c657e0e852dca6e1bf0b08e25c0528dc29dd680231ef30","cross_cats_sorted":["cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-11-17T11:59:30Z","title_canon_sha256":"9cbba521212abe5c24893cea539a265ddc9be6cddd3008e615ec5efbbd1ab50e"},"schema_version":"1.0","source":{"id":"1511.05363","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.05363","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"arxiv_version","alias_value":"1511.05363v1","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.05363","created_at":"2026-05-18T01:26:40Z"},{"alias_kind":"pith_short_12","alias_value":"DDN2USZPDBED","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DDN2USZPDBEDTDYD","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DDN2USZP","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:427bd6c66aae13e271ace02bcd6ed5af0a6610d2d697e6793c795a44e63bda49","target":"graph","created_at":"2026-05-18T01:26:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We propose a data-driven methodology for evaluating the impact of the introduction of a speed limit on the punctuality of bus services. In particular, we use high-frequency Automatic Vehicle Location data to parameterise a model that represents the movement of a bus along predefined patches of the route. We fit the probability distributions of the time spent in each patch to two classes of probability distributions: hyper-Erlang distributions, for which we use the tool HyperStar, and a variation of the three-parameter gamma distributions recommended by the Traffic Engineering Handbook. In both","authors_text":"Dani\\\"el Reijsbergen, Rajeev Ratan","cross_cats":["cs.SE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-11-17T11:59:30Z","title":"Probabilistic Modelling of the Impact on Bus Punctuality of a Speed Limit Proposal in Edinburgh (Extended Version)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.05363","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7f2bb22f74480719a3be82c0d8251ebdb1ec47461b28ee73f16c0997594f858d","target":"record","created_at":"2026-05-18T01:26:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d1747b60755bc538a7c657e0e852dca6e1bf0b08e25c0528dc29dd680231ef30","cross_cats_sorted":["cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2015-11-17T11:59:30Z","title_canon_sha256":"9cbba521212abe5c24893cea539a265ddc9be6cddd3008e615ec5efbbd1ab50e"},"schema_version":"1.0","source":{"id":"1511.05363","kind":"arxiv","version":1}},"canonical_sha256":"18dbaa4b2f1848398f03c98f51ae98c0513d9ee546a73f0f24d1f1b7ec221e28","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18dbaa4b2f1848398f03c98f51ae98c0513d9ee546a73f0f24d1f1b7ec221e28","first_computed_at":"2026-05-18T01:26:40.508382Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:40.508382Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I00afHOZotJWFHD3bG1Euco/OdbyQtK2Uy1m6iKigo+LR8lZVmjPZHIdToJfemlFhSNHOPpixQ15A30ss03aDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:40.509175Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.05363","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f2bb22f74480719a3be82c0d8251ebdb1ec47461b28ee73f16c0997594f858d","sha256:427bd6c66aae13e271ace02bcd6ed5af0a6610d2d697e6793c795a44e63bda49"],"state_sha256":"dd911f7b6496b036a2d05d3e6354956fba7df289281385c9a43fd3207ea31c30"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cf/Fjpg/XxurX6wmnEZ6nY7J5R0lQeoG8wwoVQz9FRGBnvoRSrxxaryC03AFOmdOS1sQge8BCG7rASr6RT1qAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T17:10:09.905081Z","bundle_sha256":"43ecbf144de220606e9b4ae3399fb888f1257038d840b95d63edd9b7e57a6a5d"}}