14.2 Urban Tunnel Restrictions: Prohibited, Restricted, and Unrestricted Classes
Key Takeaways
- Six categories are prohibited from the four urban tunnels: Divisions 1.1, 1.2, 1.3, 2.3, 4.3, and Division 6.1 Packing Group I inhalation hazard.
- Divisions 1.4, 1.5, 1.6, 2.2, combustible liquids, 4.1, 4.2, most 6.1, 6.2, Class 7, and Class 9 carry no restriction at the urban tunnels.
- Divisions 2.1 and 5.1 and 5.2, Class 3 flammable liquids, and Class 8 corrosives are allowed only in non-bulk quantities per container.
- Non-bulk means 119 gallons or less for a liquid, 1,000 pounds water capacity or less for a gas, and 882 pounds and 119 gallons or less for a solid.
- A cargo tank of gasoline or acid is a bulk packaging and therefore may not use the urban tunnels, even though drums of the same product may.
14.2 Urban Tunnel Restrictions: Prohibited, Restricted, and Unrestricted Classes
[!CAUTION] The urban rule is not a simple ban list. 24VAC30-61-40 sorts hazardous materials into three groups — Prohibited, No Restrictions, and Restricted — and the "Restricted" group is where drivers get caught. A gasoline tanker and a drum of gasoline are treated completely differently at the Hampton Roads Bridge-Tunnel.
Under 24VAC30-61-40, hazardous materials are regulated in the four urban tunnels — the Hampton Roads Bridge-Tunnel (I-64), the Monitor-Merrimac Memorial Bridge-Tunnel (I-664), the Elizabeth River Tunnel–Downtown (I-264), and the Elizabeth River Tunnel–Midtown (Route 58) — based on the hazard class of the material being conveyed.
Group 1: PROHIBITED — Not Allowed Through the Four Urban Tunnels
| Category | Placard Name |
|---|---|
| 1.1 | Explosives 1.1 |
| 1.2 | Explosives 1.2 |
| 1.3 | Explosives 1.3 |
| 2.3 | Poison Gas |
| 4.3 | Dangerous When Wet |
| 6.1 (Packing Group I, inhalation hazard only) | Poison Inhalation Hazard |
Six categories, and they map almost exactly onto federal Placard Table 1 minus the temperature-controlled organic peroxide and the Radioactive Yellow III entries. If you can recite Table 1, you are most of the way to the urban prohibition list.
Group 2: NO RESTRICTIONS — Free Passage Through the Urban Tunnels
| Category | Placard Name |
|---|---|
| 1.4 / 1.5 / 1.6 | Explosives 1.4 / 1.5 / 1.6 |
| 2.2 | Nonflammable Gas |
| 3 (combustible liquid) | Combustible |
| 4.1 | Flammable Solid |
| 4.2 | Spontaneously Combustible |
| 6.1 (PG I or II, other than PG I inhalation hazard) | Poison |
| 6.1 (PG III) | Inhalation Hazard placard reference |
| 6.2 | Labelled as an Infectious Substance |
| 7 | Radioactive |
| 9 | Class 9 |
[!NOTE] Class 7 Radioactive is unrestricted at the four urban tunnels under 24VAC30-61-40, and Class 9 is unrestricted as well. Note the split inside Class 3: a combustible liquid is unrestricted, while a flammable liquid falls into the restricted group below.
Group 3: RESTRICTED — Non-Bulk Quantities Per Container Only
This is the group that decides whether a real load can cross.
Materials in the following hazard classes are allowed access to the four urban tunnels in "non-bulk" quantities per container only.
| Category | Placard Name |
|---|---|
| 2.1 | Flammable Gas |
| 3 | Flammable |
| 5.1 | Oxidizer |
| 5.2 | Organic Peroxide |
| 8 | Corrosive |
What "Non-Bulk" Means Here
The regulation spells out the definition, and it is the standard federal one:
| Physical state | Non-bulk limit per container |
|---|---|
| Liquid | Maximum capacity 119 gallons (450 liters) or less |
| Gas | Water capacity 1,000 pounds (454 kilograms) or less |
| Solid | Maximum net mass 882 pounds (400 kilograms) or less and maximum capacity 119 gallons (450 liters) or less |
The Consequence Drivers Miss
+-----------------------------------------------------------------------------------+
| Class 3 Flammable Liquid at the Hampton Roads Bridge-Tunnel |
+-----------------------------------------------------------------------------------+
| 55-gallon drums of gasoline on a dry van --> NON-BULK --> ALLOWED |
| 8,500-gallon DOT-406 gasoline cargo tank --> BULK --> NOT ALLOWED |
+-----------------------------------------------------------------------------------+
A cargo tank, portable tank, or any container over the non-bulk threshold carrying a Class 2.1, Class 3 flammable, Division 5.1, Division 5.2, or Class 8 material is not permitted through the four urban tunnels. That is why fuel deliveries in Hampton Roads are routed around the tunnels rather than through them. A driver who reasons "corrosives aren't on the prohibited list, so my acid tanker is fine" has read only half the regulation.
Commercial Driving Scenario: Two Loads, Two Answers, Same Tunnel
Roadside Case Study: A carrier in Chesapeake dispatches two drivers on the same morning, both routed toward the Hampton Roads Bridge-Tunnel on I-64.
Driver A is hauling twelve 55-gallon drums of UN1830, Sulfuric acid, 8, PG II on a flatbed. Class 8 is in the Restricted group. Each drum is a 55-gallon container — under the 119-gallon non-bulk limit — so the load qualifies as non-bulk per container and may transit the HRBT.
Driver B is hauling 4,500 gallons of the same sulfuric acid in a DOT-412 cargo tank. Same chemical, same hazard class, same placard. But the cargo tank is a bulk packaging, far above the 119-gallon non-bulk limit, so the load is not permitted through the HRBT, the MMMBT, the Downtown Tunnel, or the Midtown Tunnel. Driver B must route around the harbor crossings entirely.
The placard on the side of the trailer is identical in both cases. The regulation turns on the container, not the placard.
Common Exam Traps & Pitfalls
- Trap: "If it isn't on the prohibited list, it can go through."
- The Legal Reality: There are three groups. Divisions 2.1, 5.1, 5.2, Class 3 flammable, and Class 8 are Restricted to non-bulk quantities per container, which excludes cargo tanks and portable tanks.
- Trap: Treating the MMMBT as an unrestricted alternative to the HRBT.
- The Legal Reality: All four urban facilities carry the same prohibited, restricted, and unrestricted tables. A load banned from the HRBT is banned from the Monitor-Merrimac too.
- Trap: "Radioactive material is banned from the tunnels."
- The Legal Reality: Class 7 Radioactive is listed under No Restrictions at the four urban tunnels. The prohibited list is 1.1, 1.2, 1.3, 2.3, 4.3, and 6.1 PG I inhalation hazard.
- Trap: Confusing flammable with combustible in Class 3.
- The Legal Reality: Combustible liquid is unrestricted; flammable liquid is restricted to non-bulk containers.
Which categories are prohibited from Virginia's four urban bridge-tunnel facilities under 24VAC30-61-40?
A driver hauling a DOT-412 cargo tank loaded with 4,500 gallons of Class 8 sulfuric acid plans to cross the Hampton Roads Bridge-Tunnel. Is the load permitted?
Under 24VAC30-61-40, how is Class 7 radioactive material treated at the four urban bridge-tunnel facilities?
What does "non-bulk" mean for a liquid hazardous material allowed through Virginia's urban tunnels?