At a Glance
- Car-to-cloud is ready to be leveraged today, enabling safety-enhancing awareness at scale
- Direct communication adds a future layer of safety-critical alerts as in-vehicle adoption grows
- These layers reinforce one another to create a resilient, scalable solution
Connectivity between vehicles and vulnerable road users is only effective if it remains reliable across real-world conditions. For cyclists — and other vulnerable road users (VRUs) — relying on a single communication approach leaves awareness vulnerable to gaps caused by environment, distance, and deployment realities. That is why layered connectivity is essential.
Layered connectivity combines Car-to-cloud, which delivers safety-enhancing awareness that can be deployed immediately, with Direct communication, which supports safety-critical alerts as adoption within vehicles expands. Rather than replacing one another, these layers reinforce each other, allowing awareness to improve now while scaling in depth and precision over time.
Why Visibility and Perception Alone Aren’t Enough
When a driver says “I didn’t see them” in a crash report, it often reflects not seeing soon enough, not not seeing at all. Cameras and radar detect objects that are visible, but riders and pedestrians can be obscured by:
- Curves and topography
- Other vehicles
- Parked cars or roadside elements
- Environmental conditions such as glare or weather
In these situations, connectivity adds context before and during potential interactions. Even when visibility is not obscured, just because a driver can see a VRU it does not mean they have registered that the VRU is there – consider that a majority of accidents are rear-end collisions where the vehicle drives into the VRU!
Safety-Enhancing Awareness Through Car-to-Cloud
Car-to-cloud is the first tier of awareness. It enables vehicles, cyclists, and other VRUs to receive early indications of nearby road users even when they are out of sight.
For example:
- A cyclist approaching around a bend can be registered in cloud-based awareness systems before either vehicle has visual contact
- A pedestrian walking behind an obstruction can be indicated to a vehicle before the vehicle has line of sight
This early, broad awareness helps all road users anticipate possible interactions sooner.
Safety-Critical Alerts Through Direct Communication
As road users draw nearer, Direct communication plays a different role. It enables low-latency, precise exchanges of presence and movement information between vehicles and VRUs.
This means:
- Exact position and trajectory information is available
- Real-time updates multiple times a second
- Alerts when a cyclist moves into a blind spot or when paths are converging
Direct communication is especially important when timing matters most — such as when a cyclist and car are close enough that split-second decisions can reduce risk.
Car-to-Cloud as a Bridge to Full Direct Communication
Widespread use of Direct communication inside vehicles will not happen overnight. It requires time, deployment cycles, and alignment across manufacturers and regions.
Car-to-cloud plays an important role during this transition.
By enabling safety-enhancing awareness through existing connectivity, car-to-cloud allows vehicles and vulnerable road users to benefit from shared awareness before direct communication is universally available. This ensures that protection can begin earlier, rather than waiting for full adoption of direct communication across the vehicle fleet.
As direct communication becomes more common inside vehicles, its role naturally increases — supporting safety-critical alerts when road users are in close proximity. Car-to-cloud and Direct communication therefore do not compete with one another. They work together across different stages of adoption.
Complimentary Technologies Working Together
Car-to-cloud and Direct communication are distinct but complementary:
- Car-to-cloud provides early, safety-enhancing awareness that extends beyond line of sight and even beyond the range of direct communication
- Direct communication delivers safety-critical alerts as road users approach and interactions become more imminent
Together, they form a layered defense leveraging connectivity ensuring awareness remains robust under real-world conditions.
Everyday Scenarios That Illustrate Connectivity
Cyclist ahead on a curve
A vehicle receives an early car-to-cloud notification of a cyclist beyond a blind bend. As the vehicle closes in, Direct communication refines timing and position so the driver can prepare to slow or adjust position safely.
Cyclist approaching from behind
A rider moves into a vehicle’s blind spot. Car-to-cloud gives the first indication of presence; as the cyclist overtakes, Direct communication triggers precise alerts that support safer lane-change or turn decisions.
Obstructed intersections
Parked cars or buildings can hide VRUs at intersections. Car-to-cloud can signal likely approach paths well before visual contact, and Direct communication can refine alerts as paths converge, increasing time to respond.
Why Cyclists Are a Clear Starting Point
Cyclists are often the first vulnerable road users to encounter awareness gaps because they:
- Occupy less visual space than vehicles
- Appear in unexpected places along roadways
- Move with variable speed and direction
Connectivity as Part of the Future of Mobility
The work between Spoke, Qualcomm, and other collaborators shows a pathway toward broader participation in a connected ecosystem where cyclists and vehicles share awareness in real time.
As connectivity technology scales across industries, the combination of safety-enhancing awareness and safety-critical alerts will be a natural part of how vehicles, riders, and pedestrians coexist more predictably and with greater mutual understanding.
Key takeaways
Car-to-cloud and Direct communication each serve a distinct role in supporting awareness between vehicles and vulnerable road users. Together, they form a connected defense that enhances real-world interactions, going beyond what visibility and perception alone can achieve.
