August 20th, 2026 – The Strait of Hormuz has dominated recent concerns over global shipping, but it is only one part of a much wider network of maritime chokepoints capable of disrupting international trade.
A new analysis from Oxford Economics highlights how geopolitical tensions, extreme weather and infrastructure constraints at critical waterways can quickly translate into longer transit times, reduced capacity, higher freight and insurance costs, and greater uncertainty for global supply chains.
The greater risk is not necessarily the complete closure of a major trade route. More often, disruption comes through temporary restrictions, vessel diversions, security concerns and operational delays that gradually place pressure on capacity and costs.
Oxford Economics expects the reopening and normalization of disrupted shipping routes to remain uneven through the remainder of the year, with improvements potentially followed by renewed setbacks.
For shippers, the message is clear: supply-chain resilience increasingly depends not only on where goods are sourced, but how they get from origin to destination.
Risk extends far beyond Hormuz
The Strait of Hormuz remains one of the world’s most strategically important waterways, particularly given ongoing tensions involving Iran. However, Oxford Economics notes that maritime risk is spread across numerous critical trade routes.
Nearly one-quarter of global trade passes through Asia’s Malacca and Taiwan straits, according to the report. A significant disruption in either location could have consequences well beyond Asia, affecting vessel capacity and routing as well as manufacturing inputs, energy supplies and consumer goods.
Congestion and disruption at major Chinese ports can create similar ripple effects. When carriers are forced to alter vessel rotations, delays can spread across connecting ports and inland transportation networks. Equipment availability can tighten, transit times can increase and freight rates can remain elevated even thousands of miles from the original disruption.
This interconnectedness means a relatively localized event — whether a canal restriction, conflict near a strategic strait or temporary port closure — can quickly become a wider supply-chain problem.
Chokepoints becoming geopolitical leverage
Geopolitical instability is one of the two major sources of chokepoint risk identified by Oxford Economics.
Recent conflicts have demonstrated how strategically important waterways can be used as leverage. Rather than physically closing a shipping lane, governments or armed groups can increase the cost and risk of using it through security threats, restrictions or uncertainty surrounding transit.
The Red Sea provides one of the clearest examples.
Continued Houthi activity has prevented a complete return to normal shipping patterns through the region. Even when vessels can technically transit the area, carriers must evaluate crew safety, insurance costs, vessel security and the possibility of renewed attacks.
For cargo owners, that uncertainty can translate into longer routings, additional transportation costs and less predictable delivery schedules.
Weather adds another layer of risk
Climate and extreme weather represent the second major vulnerability highlighted by the report.
Unlike geopolitical disruptions, these events do not require conflict to significantly restrict global shipping capacity.
The Panama Canal illustrates the challenge. Water levels in Lake Gatun, which supplies the canal’s locks, directly influence the drafts and number of vessels the canal can accommodate. When water availability becomes constrained, authorities can impose draft or transit restrictions.
For container shipping, lower draft limits can mean carrying less cargo, adjusting vessel deployments or using alternative routes. Each option has the potential to increase transportation costs and reduce available capacity.
Ports face similar challenges.
Typhoons and other severe weather events can temporarily close major Asian container ports, disrupting tightly coordinated vessel schedules. Those closures can then affect subsequent port calls, container availability, terminal operations, trucking and rail connections.
A port may reopen within hours or days, but the resulting schedule disruption can take considerably longer to work through the system.
The supply-chain planning gap
One of the most important takeaways for importers and exporters is that supplier diversification does not necessarily equal supply-chain diversification.
A company may purchase goods from several suppliers across different countries while unknowingly routing much of that cargo through the same port, strait or shipping corridor.
That creates a hidden concentration of transportation risk.
Companies should therefore consider transportation exposure alongside traditional supplier risk when evaluating their supply chains. Important questions include:
- Which ports and maritime chokepoints are used by our major trade lanes?
- Do multiple suppliers ultimately depend on the same shipping corridor?
- What alternative routes are available if the primary route becomes disrupted?
- How much additional transit time would an alternative routing require?
- What would a diversion mean for freight costs and available capacity?
- How much inventory coverage is available if transit times suddenly increase?
- How would weather, draft restrictions or geopolitical instability affect critical shipments?
For companies moving goods internationally, visibility into the physical transportation network is becoming increasingly important.
What this means for shippers
Recent disruptions have reinforced that supply-chain planning cannot stop at the supplier’s loading dock.
Importers and exporters should understand the ports, canals, straits and connecting transportation networks supporting their critical trade lanes and identify alternatives before disruption occurs.
For freight markets, simultaneous pressure at several chokepoints can also have a cumulative effect. Longer vessel routings effectively absorb capacity, port congestion disrupts equipment positioning and schedule reliability, and higher insurance and operating costs can ultimately feed into freight rates.
Companies with flexible routing options, appropriate inventory buffers and early visibility into changing conditions will generally be better positioned to respond when disruption occurs.
Trans-Border’s freight analysis helps identify not only areas where you might be able to reduce costs, but save money through improved business efficiency and enhanced logistics performance, looking deeply in to route and mode optimization.
For more information, email info@tbgfs.com.
