For traffic information we use Waze (smart phone app) many commuters and through travelers use and it monitors the speed of everyone who has it "on" and reports in broad increments like "over 40 MP". You can see accidents and road work well ahead with time to exit and take the recommended alternate route. It carries reports of vehicles stopped on the shoulder and location of police both visible and hidden.
The Nav system in the coach also has traffic reporting, just not as timely as waze. For contact with a driver near me not so much, but then when I had a CB in the coach that was true also. Next big generalized talk to everyone at once app is "firechat" it is direct wifi to wifi and bypasses the internet and doesn't need phone service as long as there is another active wifi user nearby.