{"first_publish_date": "1980", "key": "/works/OL1739719W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL200763A"}}], "subjects": ["Crossings", "Express highways", "Hazardous substances", "Lighting", "Maintenance and repair", "Pavements", "Railroads", "Reflectors (Safety devices)", "Roads", "Safety measures", "Skid resistance", "Traffic accidents", "Traffic safety", "Transportation", "United States", "United States. Federal Highway Administration", "Railroad crossings"], "title": "Safety effectiveness evaluation", "subject_places": ["United States"], "type": {"key": "/type/work"}, "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-09T22:14:49.295276"}, "last_modified": {"type": "/type/datetime", "value": "2023-01-06T07:56:23.818010"}}