Traffic cabinets bake in summer heat, freeze in winter, and sit exposed to vibration from passing trucks every day. Commercial-grade network gear was never built for that environment, and when it fails at an intersection or a rail crossing, the cost is not just downtime, it is public safety. This guide breaks down what these networking solutions actually need to deliver for transportation agencies, what to look for when buying, and how Comnet's hardened switches and media converters are built to meet those demands.
Note: If your agency is still specifying commercial-grade switches for outdoor traffic cabinets, you're likely already absorbing the cost in repeat truck rolls and early failures. If you switch to hardware built for the -40°C to +75°C range from the start, you cut that maintenance cycle and extend service life across the network. Talk to a Comnet specialist about matching the right switch or media converter to your next ITS deployment.
A networking solution for ITS deployments includes the switches, media converters, and supporting hardware that connect traffic signals, cameras, sensors, and roadside equipment into a single, manageable network. They form the physical backbone that lets traffic management centers see what is happening on the road and respond in real time, keeping vehicles and pedestrians moving safely through every intersection on the network.
Comnet designs networking solutions specifically for this kind of field deployment. Every product in the lineup is built to operate in outdoor cabinets and harsh environments where standard commercial network equipment fails early, which is why agencies specifying Comnet's networking solutions see fewer truck rolls and longer service life across their network footprint.
A traffic network is only as reliable as its weakest link. If a single switch in a signal cabinet drops offline, an entire intersection can lose connectivity to the traffic management center, and the surrounding network segment loses visibility along with it. That is why network infrastructure decisions for ITS deployments carry more weight than they would in a typical office environment.
Every cabinet on the network is a potential point of failure, and every additional camera, sensor, or controller adds more network traffic for the switches to handle. Agencies that treat network infrastructure as an afterthought tend to see it show up later as recurring truck rolls, signal timing issues, or gaps in video coverage at exactly the intersections where reliable connectivity matters most.
ITS networks are not contained in one building. They stretch across miles of roadway, connecting dozens or hundreds of cabinets back to a central hub. Seamless connectivity between every node, regardless of distance or weather, is the baseline requirement, not a bonus feature.
Traffic cameras, vehicle detection sensors, and adaptive signal controllers generate continuous traffic on the network. Equipment needs to deliver optimal performance around the clock, without the bandwidth bottlenecks or dropped packets that disrupt signal timing.
A complete ITS deployment relies on a handful of core hardware categories, all of which connect back into the same managed network. Comnet builds across every one of them, so agencies and integrators can specify a single, compatible networking solutions provider instead of stitching together parts from multiple vendors and troubleshooting compatibility issues across the network later.
Managed switches are the control point for any ITS network. They allow VLAN segmentation by intersection or corridor, monitor port-level activity, and support ring redundancy so traffic does not stop moving if one fiber link goes down. Comnet's managed switch lineup, including the 24-port CNGE24FX12TX12MS family, combines up to 12 SFP fiber ports with 12 copper gigabit ports for flexible field topologies.
Cameras, wireless access points, and detection sensors in the field typically run on Power over Ethernet rather than separate power runs. Comnet's 10-port CNGE10FX2TX8MSBT switch delivers 90W 802.3bt PoE on all 8 copper ports concurrently, with a 720W total power budget, which is enough to run high-draw PTZ cameras and heaters without tripping the budget mid-deployment.
When a corridor stretches well beyond copper's distance limits, a media converter bridges the gap. Comnet's CNMCSFP family provides hardened 10/100/1000 SFP media conversion, with a managed CNMCSFP/M variant for sites that need remote visibility into link status.
SFP ports on Comnet switches and media converters give integrators flexibility to match fiber type, single mode or multimode, to the distance and budget of each corridor segment without locking into a fixed fiber interface.
ITS infrastructure is increasingly treated as critical infrastructure, and the network security expectations attached to it have moved well past a flat, unsegmented topology. A network that connects traffic signals, public safety cameras, and city data feeds is a target, and the network design has to account for that from the start rather than bolting on security after a deployment is already live.
Splitting a traffic network into VLANs by function, signal control, video, and sensor data, limits how far a compromised device can reach and keeps signal-critical traffic isolated from less sensitive feeds on the same network. Comnet's managed switches support this kind of network segmentation natively, so integrators do not need separate hardware to enforce it.
Field technicians need remote access to diagnose a cabinet without a site visit, but that access has to be controlled at the network level. Comnet's managed switch and media converter lineup supports secure remote management so agencies are not choosing between convenience and control over who can reach the network.
Specifying networking solutions for a transportation project comes down to a short list of decisions that determine whether the equipment survives in the field.
A signal cabinet on an exposed roadway can swing from well below freezing to well over 100°F inside the enclosure. Comnet's hardened switches and media converters are rated for a -40°C to +75°C operating range, with resistance to vibration, EMI, and voltage spikes built in from the start.
Before specifying a switch, calculate the total wattage draw of every camera, sensor, and access point on that cabinet. Comnet's 802.3bt switches scale up to 90W per port, so integrators can plan for current device loads and future expansion without an upgrade.
Managed switching gives integrators VLAN control, SNMP monitoring, and ring redundancy, all of which matter for corridor-scale traffic networks. Unmanaged switching has a place in small, fixed installations, but most agency-scale networking solutions for ITS call for managed hardware.
Federally funded transportation projects under the Infrastructure Investment and Jobs Act require domestic content compliance under the Build America, Buy America Act. Comnet offers more than 25 BABA-certified switch and media converter models, alongside NDAA and TAA compliance, so agencies can specify equipment that clears funding review without a separate sourcing search.
Comnet has spent decades building networking solutions specifically for transportation, utility, and public safety customers, not adapting commercial gear after the fact.
From the 11-port CNGE3FE8MS and CNGE11FX3TX8MS families to the 24-port CNGE24FX12TX12MS line, Comnet's managed switches combine fiber uplinks, copper ports, and PoE variants in configurations sized for everything from a single intersection to a corridor hub.
The CNGE2MCPOE.BT high-power PoE media converter and the CNMCSFP and CNMC2+1SFP families round out Comnet's BABA-certified media converter lineup, giving integrators fiber connectivity options that are ready to specify on federally funded bids today.
Comnet pairs its hardware with specialists who help with system design before the sale and deployment support after it, which matters when a network spans dozens of remote cabinets that a field crew cannot easily revisit.
A managed network does more than move packets. SNMP monitoring on Comnet's managed switches gives network administrators visibility into port status, link health, and traffic patterns across every cabinet on the network, so a failing fiber link or an overloaded port shows up as an alert instead of a complaint about a dark camera feed. That kind of network data turns a reactive maintenance model into a proactive one, and it is one of the clearest arguments for managed switching on any network of meaningful size.
Every minute a traffic signal network loses connectivity is a minute traffic management staff are operating blind. Comnet's networking solutions are built around redundancy, ring topology support, and industrial-grade components that minimize downtime in network conditions that would degrade standard commercial equipment within a season. Ring redundancy in particular means a single fiber cut does not take down the rest of the network segment behind it, since traffic reroutes automatically to the remaining path.
Transportation networks rarely stay the same size for long. New intersections get instrumented, new corridors get added to the network, and existing cabinets need more bandwidth as camera resolutions climb. Comnet's modular switch and media converter lineup lets agencies scale their network corridor by corridor instead of redesigning the entire network each time a project expands, and the same managed switch families used at a single intersection scale up to the 24-port models used at a corridor hub.
Networking solutions built for ITS deployments are made to survive outdoor cabinets, with wide operating temperature ranges, vibration resistance, and EMI immunity that standard commercial network equipment is not designed to handle.
It depends on the device mix, but a single PTZ camera with heater and wiper can draw close to 90W, which is why Comnet's 802.3bt switches support that level per port across all 8 ports concurrently.
Yes. Comnet offers more than 25 BABA-certified switch and media converter models, along with NDAA and TAA compliant options, for federally funded transportation projects.
Most agency-scale ITS deployments benefit from managed switching because it allows VLAN segmentation, SNMP monitoring, and ring redundancy across distributed intersections, capabilities unmanaged switches do not offer.
Look for equipment rated from at least -40°C to +75°C. Comnet's hardened switches and media converters are built to that range specifically for outdoor cabinet deployments on transportation networks.
Specifying the right networking solutions up front, rather than retrofitting commercial-grade gear after it fails in the field, is what keeps an ITS network running through every season without repeat truck rolls. If you are evaluating networking solutions for an upcoming ITS project, contact Comnet to talk through switch and media converter options for your network.