Every once in a while I will try to put together a list of problems with Waze that I think should be easy to fix and will make the overall experience much better.
1.
A - Road Closures - There are temporary lane closures in cities due to parades, floods, construction etc that everyone has encountered. Unfortunately, Waze is unable to route around these in many cases, most definately if the closure is extensive. Many people have indicated that allowing Wazers to report closures could result in purposeful pranks and hijinks. I think the solution would be to allow the reporting of such events by wazers, and similar to other items, allow a driver to vote on the item when encountered, possibly allow the driver to tell waze to reroute or stay the current path, and even to allow only local site admins or those with higher rankings to approve such closures. Any solution would be better than nothing.
B - Time Sensitive Road Closures / HOV Another item associated with the above item is time sensitive changes to roads such as HOV (High Occupancy Vehicle) Lanes and similar. These are roads that change direction at different times of the day, and are closed all together at certain times of day. It would be nice to be able to enter this information into Waze, and have it approved by an area administrator. For example, in Washington DC, certain roads become one direction at certain times of the day. There is always an error report from someone that was routed down a road that is rerouted due to a time of day.
2. Zoom on large highway exits. Currently Waze only has the option to zoom in on the map based on speed or turns I believe. One problem I encounter is on highways with multiple offramps or exits. I often encounter a highway with 5+ lanes with 3 or more exits near each other, and all Waze can tell me is to keep left. Which left lane should I take? The most left lane, middle left lane, or right most left lane? Other applications like Garmin or even Google maps (on android) will zoom in on complicated highway exits or ramps and other upcoming turn events. I would think it would be simple to have an option to allow Waze to zoom in and show you which specific road to take, rather than showing me a birds eye view from 10 miles up of the highway and telling me to take my best guess at which lane I should be in.
3. GPS Signal lost in Tunnels - I often encounter tunnels in which GPS signal is lost. Other GPS applications like Garmin or Google will continue to move the car along the current road at its last speed when signal is lost. This gives you an approximation of where you are in the tunnel and also gives you an idea of upcoming roads at the end of a long tunnel. Unfortunately, Waze just stops at the last point of contact, leaving you to wonder where you are, and in the event of a very long tunnel, keeps you wondering what you will encounter until Waze picks up signal again.

