Add Smart Traffic Light AI agents (Group 1 assignment)

[Copilot]

Implements all four required intelligent agent types for the Smart Traffic Light environment in SWI-Prolog, plus a self-contained interactive HTML demo for presentation.

Prolog agents (agents/)

• simple_reflex_agent.pl — pure condition-action rules; no state. Priority order: emergency override → pedestrian signal → set_green(Dir) when vehicles present → set_red.
• model_based_agent.pl — tracks current_green/1, phase_timer/1, wait_count/2 via dynamic facts. Enforces min (10) / max (30) green phase durations; switches to most-congested waiting direction.
• goal_based_agent.pl — goal: no direction waits > 20 steps. Builds a sorted action plan each cycle, promoting directions near threshold to the front.
• utility_based_agent.pl — scores every candidate action and picks the max:

% Named weight constants make tuning explicit
weight_throughput(3).  weight_fairness(2).
weight_emergency(100). weight_pedestrian(50).  weight_phase_change(-5).

compute_utility(Percepts, set_green(Dir), Utility) :-
    % throughput + fairness (wait time) + emergency bonus + phase-change penalty
    Utility is Wt*Count + Wf*WaitTime + Emg + PhaseCost.

Interactive demo (agents/smart_traffic_light_agents.html)

Single-file HTML+JS that mirrors the Prolog logic in the browser: tabbed UI per agent, live percept sliders, intersection visualiser with signal colours, utility bar chart, and a Prolog code reference tab. No build step — open directly in a browser.

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Project	Deployment	Actions	Updated (UTC)
matchars-car-rental	Ready	Preview, Comment	Mar 10, 2026 10:31pm