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Standards

Designed to the specification, line by line

Smart work zone specifications are detailed, and they should be. This is how the design answers each requirement, and what still has to be confirmed by a test, a datasheet or the agency.

Compliance matrix

Designed to

The design meets the requirement as written.

Verification planned

Designed to meet it; a test or datasheet review will confirm before deployment.

Vendor confirmation

Depends on a supplier's documented rating or approval.

Set per project

Agreed with the agency for each project, for example in the system plan.

Filter by status

Every requirement in the matrix

Traffic control devices

Signs and their placement follow the national manual; the contractor's traffic control plan governs the layout.

  • Portable changeable message signs: visible from ½ mile, 18-inch characters, at most two phases

    Designed to

    MUTCD 11th Edition §6L.05

    Full-matrix signs; the message library and rules enforce the line, character and phase limits.

  • Sign spacing, taper and buffer lengths

    Designed to

    MUTCD Tables 6B-1 to 6B-4

    Devices are placed around the approved traffic control layout, never in place of it.

  • Messages coordinated with the agency's public information staff

    Set per project

    Agency contract provisions

    Pre-approved message library, an approval workflow for anything else, and an audit log.

  • Speed limit changes inside an approved envelope

    Set per project

    Agency speed limit authorization

    Pace schedules and remote changes are limited to the approved speeds and logged.

  • Crashworthiness of devices in the clear zone

    Vendor confirmation

    FHWA crashworthiness policy; MASH

    Trailers sited outside the clear zone or shielded or delineated; cone-mounted sensors need the supplier's evidence.

Smart work zone devices

Current state DOT smart work zone specifications set minimums for each device type. The design targets them directly.

  • Camera: pan-tilt-zoom on a mast of at least 20 ft with at least 20× zoom

    Designed to

    State DOT smart work zone device specifications

    Lookout: 40× PTZ on a mast of up to 30 ft.

  • Traffic detection with per-lane speed, volume and occupancy

    Verification planned

    State DOT smart work zone device specifications

    Side-fire radar to 255 ft on up to 16 lanes; the ¼-mile detection clause is under datasheet review.

  • Variable speed limit sign with speed feedback

    Designed to

    State DOT smart work zone device specifications

    Pace: R2-1 48 × 60 in, 5-mph steps, feedback to 95 mph.

  • Power: visible charge status, 4 h of sun, 10 days of autonomy, automatic restart

    Verification planned

    State DOT smart work zone device specifications

    Power budgets per node with separate add-on batteries; cold-chamber test before the fleet purchase.

  • Trailers: unit number, 80-mph wind rating with anchoring, outriggers, lights, highway orange

    Vendor confirmation

    State DOT smart work zone device specifications

    Written into every trailer order, with the wind rating required at full mast height.

Data and connectivity

The data requirements are where smart work zones most often fall short. They are designed in from the start.

  • WZDx device feed, updated every 60 seconds, with version tracking

    Designed to

    USDOT Work Zone Data Exchange (WZDx) 4.2

    Command publishes the device feed every 60 seconds and tracks new WZDx releases.

  • GPS position within 10 ft and time-stamped device status

    Designed to

    State DOT smart work zone device specifications

    GNSS on every node (about 2 m); status with time stamps in every report.

  • 60-second data bins; bad data corrected within 1 hour

    Designed to

    State DOT smart work zone system specifications

    Edge binning on every node; data-quality alerts to the on-call team.

  • Archive of all data, messages and status for at least 3 years

    Designed to

    State DOT smart work zone system specifications

    Command archive with CSV and Excel export, kept 3 years after the project or handed to the agency.

  • Software availability of at least 99%

    Designed to

    State DOT smart work zone system specifications

    Command is designed for 99.9% monthly availability.

Security, accessibility and procurement

Federal-aid projects bring rules about equipment origin, radio licensing and data handling.

  • No covered telecommunications or video surveillance equipment

    Designed to

    NDAA §889; 2 CFR 200.216

    No equipment from the covered manufacturers in any LaneWarden node; component origin checked for supplied items.

  • Role-based access, MFA, session timeouts, audit logging, vulnerability scanning

    Verification planned

    Agency cyber and information security policies

    Least-privilege roles, SSO with MFA for privileged users, 20-minute timeouts, audit logs; security audit planned.

  • Accessible web interface

    Verification planned

    WCAG 2.1 AA

    Command's web interface is built to WCAG 2.1 AA; full conformance needs testing with assistive technology.

  • Media sanitization at demobilization

    Designed to

    NIST SP 800-88

    Every storage device is sanitized and the sanitization recorded when equipment leaves the project.

  • Radio equipment authorization

    Vendor confirmation

    FCC Parts 15 and 90

    Authorized equipment only; licensed paging only where a project uses it.

Guides

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