| Category | Sub-category |
|---|---|
| Access management | Access management – other |
| Change in access – close or restrict existing access | |
| Change in access – miscellaneous/unspecified | |
| Grassed median – extend existing | |
| Median crossover – close crossover | |
| Median crossover – directional crossover | |
| Median crossover – relocate existing | |
| Median crossover – unspecified | |
| Raised island – install new | |
| Raised island – modify existing | |
| Raised island – remove existing | |
| Raised island – unspecified | |
| Advanced technology and ITS | Advanced technology and ITS – other |
| Congestion detection / traffic monitoring system | |
| Dynamic message signs | |
| Over height vehicle detection | |
| Alignment | Alignment – other |
| Horizontal curve realignment | |
| Horizontal and vertical alignment | |
| Vertical alignment or elevation change | |
| Animal-related | Animal related |
| Interchange design | Acceleration / deceleration / merge lane |
| Convert at-grade intersection to interchange | |
| Extend existing lane on ramp | |
| Improve intersection radius at ramp terminus | |
| Installation of new lane on ramp | |
| Interchange design – other | |
| Ramp closure | |
| Ramp metering | |
| Intersectiongeometry | Auxiliary lanes – add acceleration lane |
| Auxiliary lanes – add auxiliary through lane | |
| Auxiliary lanes – add left-turn lane | |
| Auxiliary lanes – add right-turn lane | |
| Auxiliary lanes – add right-turn lane (free-flow) | |
| Auxiliary lanes – add slip lane | |
| Auxiliary lanes – add two-way left-turn lane | |
| Auxiliary lanes – extend acceleration/deceleration lane | |
| Auxiliary lanes – extend existing left-turn lane | |
| Auxiliary lanes – extend existing right-turn lane | |
| Auxiliary lanes – miscellaneous/other/unspecified | |
| Auxiliary lanes – modify acceleration lane | |
| Auxiliary lanes – modify auxiliary through lane | |
| Auxiliary lanes – modify free-flow turn lane | |
| Auxiliary lanes – modify left-turn lane offset | |
| Auxiliary lanes – modify right-turn lane offset | |
| Auxiliary lanes – modify turn lane storage | |
| Auxiliary lanes – modify turn lane taper | |
| Auxiliary lanes – modify two-way left-turn lane | |
| Intersection geometrics – miscellaneous/other/unspecified | |
| Intersection geometrics – modify intersection corner radius | |
| Intersection geometrics – modify skew angle | |
| Intersection geometrics – realignment to align offset cross streets | |
| Intersection geometrics – realignment to increase cross street offset | |
| Intersection geometrics – re-assign existing lane use | |
| Intersection geometry – other | |
| Splitter island – install on one or more approaches | |
| Splitter island – remove from one or more approaches | |
| Splitter island – unspecified | |
| Through lanes – add additional through lane | |
| Intersection traffic control | Intersection flashers – add "when flashing" warning sign-mounted |
| Intersection flashers – add advance emergency vehicle warning sign-mounted | |
| Intersection flashers – add advance heavy vehicle warning sign-mounted | |
| Intersection flashers – add advance intersection warning sign-mounted | |
| Intersection flashers – add miscellaneous/other/unspecified | |
| Intersection flashers – add overhead (actuated) | |
| Intersection flashers – add overhead (continuous) | |
| Intersection flashers – add stop sign-mounted | |
| Intersection flashers – modify existing | |
| Intersection flashers – remove existing | |
| Intersection signing – add basic advance warning | |
| Intersection signing – add enhanced advance warning (double-up and/or oversize) | |
| Intersection signing – add enhanced regulatory sign (double-up and/or oversize) | |
| Intersection signing – miscellaneous/other/unspecified | |
| Intersection signing – relocate existing regulatory sign | |
| Intersection traffic control – other | |
| Modify control – all-way stop to roundabout | |
| Modify control – modifications to roundabout | |
| Modify control – no control to roundabout | |
| Modify control – no control to two-way stop | |
| Modify control – remove right-turn yield | |
| Modify control – reverse priority of stop condition | |
| Modify control – traffic signal to roundabout | |
| Modify control – two-way stop to all-way stop | |
| Modify control – two-way stop to roundabout | |
| Modify control – two-way yield to two-way stop | |
| Pavement Markings – add advance signal ahead | |
| Pavement markings – add advance stop ahead | |
| Pavement markings – add dashed edge line along mainline | |
| Pavement markings – add lane use symbols | |
| Pavement markings – add stop line | |
| Pavement markings – add yield line | |
| Pavement markings – miscellaneous/other/unspecified | |
| Pavement markings – refresh existing pavement markings | |
| Modify traffic signal – add additional signal heads | |
| Modify traffic signal – add backplates | |
| Modify traffic signal – add backplates with retroreflective borders | |
| Modify traffic signal – add closed loop system | |
| Modify traffic signal – add emergency vehicle preemption | |
| Modify traffic signal – add flashing yellow arrow | |
| Modify traffic signal – add long vehicle detection | |
| Modify traffic signal – add railroad preemption | |
| Modify traffic signal – add wireless system | |
| Modify traffic signal – miscellaneous/other/unspecified | |
| Modify traffic signal – modernization/replacement | |
| Modify traffic signal – modify signal mounting (spanwire to mast arm) | |
| Modify traffic signal – remove existing signal | |
| Modify traffic signal – replace existing indications (incandescent-to-LED and/or 8-to-12 inch dia.) | |
| Modify traffic signal timing – left-turn phasing (permissive to protected/permissive) | |
| Modify traffic signal timing – left-turn phasing (permissive to protected-only) | |
| Modify traffic signal timing – adjust clearance interval (yellow change and/or all-red) | |
| Modify traffic signal timing – general retiming | |
| Modify traffic signal timing – signal coordination | |
| Systemic improvements – signal-controlled | |
| Systemic improvements – stop-controlled | |
| Lighting | Continuous roadway lighting |
| Intersection lighting | |
| Lighting – other | |
| Site lighting – horizontal curve | |
| Site lighting – intersection | |
| Site lighting – interchange | |
| Site lighting – pedestrian crosswalk | |
| Miscellaneous | Miscellaneous |
| Non-infrastructure | Educational efforts |
| Enforcement | |
| Data/traffic records | |
| Non-infrastructure – other | |
| Outreach | |
| Road safety audits | |
| Training and workforce development | |
| Transportation safety planning | |
| Parking | Modify parking |
| Parking – other | |
| Remove parking | |
| Restrict parking | |
| Truck parking facilities | |
| Pedestrians and bicyclists | Crosswalk |
| Install new "smart" crosswalk | |
| Install new crosswalk | |
| Install sidewalk | |
| Medians and pedestrian refuge areas | |
| Miscellaneous pedestrians and bicyclists | |
| Modify existing crosswalk | |
| Pedestrian beacons | |
| Pedestrian bridge | |
| Pedestrian signal | |
| Pedestrian signal – audible device | |
| Pedestrian signal – Pedestrian Hybrid Beacon | |
| Pedestrian signal – install new at intersection | |
| Pedestrian signal – install new at non-intersection location | |
| Pedestrian signal – modify existing | |
| Pedestrian signal – remove existing | |
| Pedestrian warning signs – add/modify flashers | |
| Pedestrian warning signs – overhead | |
| Railroad grade crossings | Grade separation |
| Model enforcement activity | |
| Protective devices | |
| Railroad grade crossing gates | |
| Railroad grade crossing signing | |
| Railroad grade crossings – other | |
| Surface treatment | |
| Upgrade railroad crossing signal | |
| Widen crossing for additional lane | |
| Roadside | Barrier end treatments (crash cushions, terminals) |
| Barrier transitions | |
| Barrier – cable | |
| Barrier – concrete | |
| Barrier – metal | |
| Barrier – other | |
| Barrier – removal | |
| Curb or curb and gutter | |
| Drainage improvements | |
| Fencing | |
| Removal of roadside objects (trees, poles, etc.) | |
| Roadside grading | |
| Roadside – other | |
| Roadway | Install / remove / modify passing zone |
| Pavement surface – high friction surface | |
| Pavement surface – miscellaneous | |
| Roadway narrowing (road diet, roadway reconfiguration) | |
| Roadway – other | |
| Roadway – restripe to revise separation between opposing lanes and/or shoulder widths | |
| Roadway widening – add lane(s) along segment | |
| Roadway widening – curve | |
| Roadway widening – travel lanes | |
| Rumble strips – center | |
| Rumble strips – edge or shoulder | |
| Rumble strips – transverse | |
| Rumble strips – unspecified or other | |
| Superelevation / cross slope | |
| Roadway delineation | Improve retroreflectivity |
| Longitudinal pavement markings – new | |
| Longitudinal pavement markings – remarking | |
| Delineators post-mounted or on barrier | |
| Raised pavement markers | |
| Roadway delineation – other | |
| Roadway signs and traffic control | Curve-related warning signs and flashers |
| Sign sheeting – upgrade or replacement | |
| Roadway signs and traffic control – other | |
| Roadway signs (including post) – new or updated | |
| Shoulder treatments | Widen shoulder – paved or other |
| Pave existing shoulders | |
| Shoulder grading | |
| Shoulder treatments – other | |
| Speed management | Modify speed limit |
| Radar speed signs | |
| Speed detection system / truck warning | |
| Speed management – other | |
| Traffic calming feature | |
| Work Zone | Work zone |