INDGOA·GATE 1 Entry automation proposal · rev 5
Live demo

Watch the gate think

It opens in Free play with live traffic: vehicles keep arriving, get approved, roll the express lane — and now and then one is refused and guided around the U-turn. Take over the console any time, drag vehicles to make trouble, or switch to Walkthrough for the narrated scenarios.

VERIFICATION ARM EXPRESS ARM WAITING 0 INSIDE 0 RESIDENT AVG – ALARM: TAILGATE
Guard post console + intercom VERIFICATION LANE — guard checks non-residents EXPRESS LANE — ANPR rolling green · residents, either lane EXIT ROAD — back out to the street gate mouth · property line Setback — queues live here, not on the street ANPR read line KA 05 MK 3412 RESIDENT ✓ TAILGATE DETECTED — INTERCEPTING INSIDE Street Community
1

Scenarios

Drag anything — pull vehicles from the buttons above or grab them mid-drive. Drop one past an arm, in the wrong lane, or on the exit road, and watch the system object.
Party mode — pass the mouse or share this screen.
  • Traffic drags vehicles in and tries to break the gate
  • Gate guard works the console cards
  • Queue guard owns manual raises and U-turns
The gate wins if RESIDENT AVG stays under 10s and nothing unverified gets past the arms.
BREACHES 0U-TURNS 0WRONG LANE 0TWO-WHEELERS 0
Shared room
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Guard console

No pending checks — the system is handling it.

Event log

    Two lanes. Arms set back.
    The street never clogs.

    A proposal for our two-lane main gate: no barrier at the mouth. An ANPR camera on each lane reads every plate right at the entrance, and the two boom barriers sit side by side at the inner line, a few car-lengths in. The space between mouth and arms is the setback — any queue lives there, on our own property. Non-residents — visitors, deliveries, tankers, school buses — keep to the left lane (the upper one in this view), where a guard always verifies them inside the setback. Residents may use either lane: the cameras clear them wherever they're seen, so the other lane runs as an express lane on a rolling green. And at peak, a second guard can clear easy cases out of the queue and wave them across — scenario 7 shows it. A human stays in the loop for everything the system can't decide.

    Try it Hover or tap anything in the diagram above — every camera, loop and barrier explains itself.
    Decision logic

    Every vehicle, one flowchart

    The cameras decide at the mouth, while the car is still rolling. Everything after the split is designed so the guard only ever touches the cases that genuinely need a human — roughly one vehicle in five.

    ANPR reads every plate at the mouthboth lanes, ~20 m before the arms — the car never stops for this
    Match in the resident registry?maintained by the GOA office, synced to the gate
    Yes — rolling green, either lane
    Arm rises as the car arrivesrolling green — no stop, no token, no window down
    Through in ≈6 secondsmouth to inside · guard untouched · logged
    No match in the express lane?arm stays down · guard matches manually or waves them left · ~30 s, not a scene
    No — verification lane (left / upper)
    Pre-registered?visitor code · delivery OTP · tanker / bus schedule
    NO
    Stops at the arm, inside the setback · guard verifiesintercom to resident · ID noted · purpose logged (pre-registered: one-tap confirm)
    Guard approves?timeout > 2 min alerts the supervisor
    YES
    Arm risesentry logged: plate · photo · time · decision
    NO
    Manual raise → U-turn past the armno hard deny — the guard opens the boom (logged), the vehicle turns at the junction where entry meets exit, and leaves forward
    No arm at the mouthNothing ever stops a vehicle on the public road. Queues, checks and refusals all happen in the setback — on GOA property.
    Everything is loggedEvery read, opening and decision stores plate, photo, timestamp and who decided — system or guard.
    Human in the loopThe guard can always override in either direction. Overrides are just another logged event, not an exception.
    Queue-busterAt peak, a second guard clears easy cases mid-queue with a handheld and waves them into the express lane — the arm opened manually, logged. Scenario 7.
    The hard question

    Why there is no barrier at the entrance

    A fair challenge from the team: won't a boom barrier at the entrance clog traffic? Yes — it will. That's why this design doesn't have one. Here's the same gate drawn both ways.

    Proposed · arms set back, mouth open mouth setback · queue space arms
    • The street never blocks — queues, checks and refusals happen in the setback, on GOA land.
    • Residents roll through — the match happens at the mouth, the arm has a head start.
    • The service lane can be slow without cost — a tanker being verified holds nobody but the lane behind it.
    • Honest cost: a tailgater through the resident arm is inside — detected, photographed and intercepted, but inside. See the playbook below.
    Rejected · arm at the entrance arm at mouth queue on public road
    • Every single entry — including residents — stops on the public road.
    • A barrier arm cycles in ~2–3 s: a hard ceiling of roughly 6–10 vehicles a minute, at the worst possible spot.
    • Rear-end risk where street traffic meets a surprise stop.
    • A refusal becomes a three-point turn on the road, blocking both lanes.

    To be fair to the other side: an outer barrier does buy three real things. Here they are, with what covers them instead.

    CONTAINMENT

    Trapping a tailgater

    Two arms in series form an airlock — a breach is boxed between them. Instead: the counting loop detects the breach instantly, cameras lock on, the guard intercepts inside. If the committee ever wants hard containment, add a second arm to one lane, set back — never at the mouth.

    METERING

    One car at a time

    An outer arm forces single-file entry, which makes counting trivial. Instead: the counting loop at each inner arm does the same arithmetic without stopping anyone at the street.

    EARLY REFUSAL

    Stopping them at the line

    An outer arm refuses entry before a vehicle is on GOA property. Instead: the setback is still our property — a refusal there is enforceable, photographed, and leaves forward via the exit-road U-turn, never in reverse. Nothing is gained by moving the argument onto the road.

    RecommendationBoth arms at the inner line, set back from the mouth; cameras at the mouth; no barrier at the entrance. The only good reasons for an outer arm are containment, metering and early refusal — and each is covered cheaper by detection, loops and the setback itself. If hard tailgate containment ever becomes a committee requirement, the upgrade is a second arm on the express lane only, placed inside the setback — a mini-airlock, still nowhere near the street.
    Failure playbook

    When things go wrong — and they will

    A gate is judged on its worst day, not its best. Each of these has a planned, boring answer.

    SECURITY

    Tailgating

    A second car slips through the express arm behind a legitimate one — the arm can't drop on it (safety interlock). The counting loop flags two-on-one-opening instantly: alarm at the console, cameras already have plate and faces, the guard intercepts inside. Detected and documented, not silently absorbed. Scenario 5 shows it, honestly.

    OPERATIONS

    ANPR misread

    Mud, a bent plate, a fancy font. Low-confidence reads simply leave the arm down: the guard matches the car manually against the registry from the console, and the plate is flagged for re-enrolment. Thirty seconds, not a stranding.

    RESILIENCE

    Power failure

    Controller and barriers run on a UPS for 4–6 hours. If everything dies, both arms have a manual release and swing free — the gate degrades to what it is today: a guard with a register.

    SAFETY

    The arm never hits a car

    A photocell beam plus the loop interlock the arm — it physically cannot descend while anything is beneath it. This is also why tailgating is possible, and why detection (not hope) handles it.

    OPERATIONS

    Entry denied

    There is no hard deny and no reversing. The guard raises the arm manually (logged), the vehicle rolls through to the U-turn junction where the entry and exit roads join, turns under the guard's direction, and leaves forward. Incident and photos logged; the street never saw it.

    SECURITY

    Ambulance at the gate

    One button on the console throws both arms up instantly, no questions. The override is auto-logged and reviewed by the committee later — seconds matter more than protocol.

    RESILIENCE

    Internet down

    The whitelist lives on the gate controller and syncs when connectivity returns. An outage changes nothing at the barrier — reads, decisions and logs continue locally.

    OPERATIONS

    Queue outgrows the setback

    If the verification queue ever nears the mouth, the console flags it before the street feels it. The fix is process, not steel: push pre-registration harder, put a second guard on the queue with a handheld (scenario 7), widen tanker windows. Scenario 6 shows the queue breathing.

    Kit & crew

    What to buy, who does what

    The shopping list is short and standard — every item below is stock equipment for Indian gate vendors. The roles matter more than the hardware.

    2×ANPR cameras (IR)
    One per lane at the mouth. Reads HSRP plates day/night at up to ~30 km/h, ~100 ms per read.
    2×Boom barriers
    3–4 m arm, 1.5–3 s travel, manual release. Side by side at the inner line, set back from the mouth.
    4×Induction loops
    Counting + safety at each arm. The counting loop is the tailgate detector.
    2×Safety photocells
    A beam across each lane at the arm — it never descends onto a vehicle, pet or person.
    2×LED lane signals
    Green / red at each arm. Drivers self-instruct; the guard stops waving.
    1×Guard console
    Tablet or small PC at the post: verification cards, one-tap approve/deny, overrides, full searchable log.
    1×Handheld console
    For a second guard at peak — verify pre-registrations mid-queue and clear vehicles into the express lane.
    1×Intercom / video phone
    At the visitor arm — pocket-to-resident calls without the guard leaving the window.
    1×Gate controller + UPS
    Runs the logic and the cached whitelist locally; 4–6 h battery backup.
    The system

    Reads, matches, opens, closes, counts, logs. Silently handles the ~80% of traffic that is residents — the guard never touches it.

    The guards

    Own the other 20%: verify the verification lane, sort express-lane exceptions, respond to tailgate alarms, guide refused vehicles around the U-turn junction, hold the emergency override. At peak, a second guard works the queue with a handheld, clearing easy cases into the express lane.

    Residents

    Keep their plates registered with the GOA office, and pre-register expected guests and deliveries — which is what makes their own rolling green possible.

    GOA committee

    Owns registry policy, reviews the log and incidents monthly, sets tanker and school-bus windows, and audits overrides.