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Running on Zero
Running on Zero
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f234112 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | from src.integration.decision_engine import DecisionEngine
from src.integration.safety_gate import SafetyGate
from src.integration.fallback_controller import FallbackController
class TrafficController:
def __init__(self):
self.decision_engine = DecisionEngine()
self.safety_gate = SafetyGate()
self.fallback_controller = FallbackController()
def _validate_phase(self, phase, checks):
"""
Run the Safety Gate for one phase.
"""
return self.safety_gate.validate(
phase=phase,
topology_valid=checks["topology_valid"],
conflict_free=checks["conflict_free"],
timing_valid=checks["timing_valid"],
pedestrian_clear=checks["pedestrian_clear"],
downstream_available=checks["downstream_available"],
emergency_safe=checks["emergency_safe"],
confidence=checks["confidence"],
safety_risk=checks.get("safety_risk", 0.0),
accident_detected=checks.get("accident_detected", False),
safety_confidence=checks.get("safety_confidence")
)
def decide_and_validate(
self,
phase_scores,
phase_checks,
phase_densities=None,
phases=None,
current_index=0
):
"""
Complete fault-tolerant traffic control pipeline.
AI
↓
Safety Gate
↓
Rule-Based
↓
Density-Based
↓
Fixed-Time
"""
if not phase_scores:
raise ValueError("No phase scores provided")
# --------------------------------
# STEP 1: AI DECISION
# --------------------------------
decision = self.decision_engine.select_best_phase(
phase_scores
)
selected_phase = decision["selected_phase"]
if selected_phase not in phase_checks:
raise ValueError(
f"No safety checks found for {selected_phase}"
)
# --------------------------------
# STEP 2: SAFETY CHECK AI PHASE
# --------------------------------
safety_result = self._validate_phase(
selected_phase,
phase_checks[selected_phase]
)
# --------------------------------
# STEP 3: AI APPROVED
# --------------------------------
if safety_result["approved"]:
return {
"selected_phase": selected_phase,
"decision_score": decision["score"],
"all_phase_scores": decision["all_scores"],
"method": "ai_adaptive",
"safety": safety_result,
"execute": True
}
# --------------------------------
# AI REJECTED
# --------------------------------
unsafe_phases = {selected_phase}
# --------------------------------
# STEP 4: RULE-BASED FALLBACK
# --------------------------------
fallback_result = self.fallback_controller.rule_based(
phase_scores,
unsafe_phases=unsafe_phases
)
if fallback_result is not None:
fallback_phase = fallback_result["selected_phase"]
fallback_safety = self._validate_phase(
fallback_phase,
phase_checks[fallback_phase]
)
if fallback_safety["approved"]:
return {
"selected_phase": fallback_phase,
"decision_score": decision["score"],
"all_phase_scores": decision["all_scores"],
"method": "rule_based_fallback",
"safety": fallback_safety,
"fallback": fallback_result,
"execute": True
}
unsafe_phases.add(fallback_phase)
# --------------------------------
# STEP 5: DENSITY FALLBACK
# --------------------------------
if phase_densities:
density_result = self.fallback_controller.density_based(
phase_densities,
unsafe_phases=unsafe_phases
)
if density_result is not None:
density_phase = density_result["selected_phase"]
density_safety = self._validate_phase(
density_phase,
phase_checks[density_phase]
)
if density_safety["approved"]:
return {
"selected_phase": density_phase,
"decision_score": decision["score"],
"all_phase_scores": decision["all_scores"],
"method": "density_based_fallback",
"safety": density_safety,
"fallback": density_result,
"execute": True
}
unsafe_phases.add(density_phase)
# --------------------------------
# STEP 6: SAFE FIXED-TIME
# --------------------------------
if phases is None:
phases = list(phase_scores.keys())
for offset in range(len(phases)):
index = (current_index + offset) % len(phases)
fixed_phase = phases[index]
if fixed_phase in unsafe_phases:
continue
fixed_safety = self._validate_phase(
fixed_phase,
phase_checks[fixed_phase]
)
if fixed_safety["approved"]:
fixed_result = {
"method": "fixed_time",
"selected_phase": fixed_phase
}
return {
"selected_phase": fixed_phase,
"decision_score": decision["score"],
"all_phase_scores": decision["all_scores"],
"method": "safe_fixed_time",
"safety": fixed_safety,
"fallback": fixed_result,
"execute": True
}
# --------------------------------
# STEP 7: NOTHING IS SAFE
# --------------------------------
return {
"selected_phase": None,
"decision_score": decision["score"],
"all_phase_scores": decision["all_scores"],
"method": "emergency_safe_stop",
"safety": safety_result,
"execute": False
} |