diff --git a/lib/incidents/validate.ts b/lib/incidents/validate.ts
index 63e9d64..45eeac2 100644
--- a/lib/incidents/validate.ts
+++ b/lib/incidents/validate.ts
@@ -1,4 +1,4 @@
-export const INCIDENT_TYPES = ['injury', 'near_miss', 'hazard', 'asset_damage', 'environmental', 'security', 'fire'] as const
+export const INCIDENT_TYPES = ['injury', 'near_miss', 'hazard', 'asset_damage', 'environmental', 'security', 'fire', 'transport'] as const
 export const MEDICAL_STATUSES = ['none', 'first_aid', 'medical_treatment', 'lti'] as const
 
 export type IncidentType = typeof INCIDENT_TYPES[number]
@@ -12,6 +12,7 @@ export interface IncidentInput {
   medical_status?: MedicalStatus
   asset_involved: boolean
   type_details?: Record<string, unknown>
+  truck_id?: string | null
 }
 
 // Whitelisted type-specific intake fields per incident type (PRD §3).
@@ -76,6 +77,8 @@ export function validateIncidentInput(input: IncidentInput): { ok: boolean; erro
   if (!INCIDENT_TYPES.includes(input.incident_type)) errors.push('incident_type is invalid')
   if (input.injury_involved && !input.medical_status) errors.push('medical_status is required when injury is involved')
   if (input.medical_status && !MEDICAL_STATUSES.includes(input.medical_status)) errors.push('medical_status is invalid')
+  if (input.incident_type === 'transport' && !input.truck_id?.trim())
+    errors.push('truck_id is required for transport incidents')
 
   return { ok: errors.length === 0, errors }
 }
diff --git a/tests/lib/incidents/validate.test.ts b/tests/lib/incidents/validate.test.ts
index 201719f..64beccf 100644
--- a/tests/lib/incidents/validate.test.ts
+++ b/tests/lib/incidents/validate.test.ts
@@ -42,6 +42,30 @@ describe('validateIncidentInput', () => {
     expect(result.ok).toBe(false)
     expect(result.errors).toContain('incident_type is invalid')
   })
+
+  it('accepts transport type when truck_id is present', () => {
+    const r = validateIncidentInput({
+      zone_token: 'z',
+      incident_type: 'transport',
+      description: 'Truck clipped the dock frame reversing into bay 3.',
+      injury_involved: false,
+      asset_involved: false,
+      truck_id: 'truck-uuid',
+    } as any)
+    expect(r.ok).toBe(true)
+  })
+
+  it('rejects transport type without a truck_id', () => {
+    const r = validateIncidentInput({
+      zone_token: 'z',
+      incident_type: 'transport',
+      description: 'Truck clipped the dock frame reversing into bay 3.',
+      injury_involved: false,
+      asset_involved: false,
+    } as any)
+    expect(r.ok).toBe(false)
+    expect(r.errors).toContain('truck_id is required for transport incidents')
+  })
 })
 
 describe('validateTypeDetails', () => {