It could also benefit people with carpooling. But there is a suggestion specific for this already (see http://waze.uservoice.com/forums/59225-map-editor-and-waze-com-website/suggestions/1137201-carpooling)

Tradução:
Adicionar uma opção que seja possivel alternar entre “motorista” e “carona” no app do Waze. Como carona, vc informa para o Waze onde quer ir. Quando um motorista fizer o mesmo, aparecerão no mapa todas as pessoas que poderiam vir a ser beneficiadas pela sua rota. Caberia agora ao motorista, decidir se dá ou não a carona.

Poderia ser possível configurar as preferencias de privacidade para:
- mostrar sua rota para todas as pessoas procurando carona;
- mostrar apenas para caronas de um grupo específico;
- mostrar apenas para amigos do Facebook;
- não mostrar para ninguém (caso não tenha interesse em fornecer caronas)
As pessoas procurando caronas deveriam ter suas configurações de privacidade especificas também.

Quando uma pessoa pegasse uma carona, ela informaria ao Waze quem está dando a carona. A partir dali, ambos passariam a ganhar mais pontos por km, ou algo do tipo.

Acredito que esse sistema não implicaria em muitos problemas de segurança pelo fato de não ter anonimato. Poderia ser adicionado um sistema de verificação (como no twitter) e qualificação de usuários.

Essa ideia ajudaria nosso planeta e daria ao Waze um apelo sustentável! :)

Pegando a ideia de outro usuário (veja o post http://world.waze.com/forum/viewtopic.php?f=7&t=19760&p=204604&hilit=hitch#p204604), seria muito bom também reportar pessoas pedindo carona no mapa caso vc note algum viajante na estrada e não possa (ou não queira) dar carona. Seria uma boa forma de ajudar mochileiros e viajantes mesmo que eles não possuam Waze.

Add the option to switch from “driver” to “hitchhiker” in the app. As a hitchhiker, you inform to Waze where you want to go. When a driver do the same, it will show on the map all the hitchhikers that could be benefited by his route. It’s now up to the driver if he want to pick them up.

It could be possible to change the privacy preferences for:
- showing your routes for all the hitchhikers;
- show only for hitchhikers that are in a specific group;
- show only to your Facebook friends;
- or hide for everyone (if you hated this ideia of giving rides using Waze).

Hitchhikers should have your own privacy system too.

When a hitchkiker pick up a ride, he “tell” to the Waze app who is giving the ride. At that moment, they both receive more points per mile, or something like that.

I think this non-anonymous system would solve most of the security issues that a hitch hiker could imply. It could be added a rate system or verified user system.

It would definitely help our planet and give Waze a sustainable catch! :)

Getting the idea of another user (see his post here http://world.waze.com/forum/viewtopic.php?f=7&t=19760&p=204604&hilit=hitch#p204604), it would also be nice to report hitchhikers on the map if you notice one on a road and don’t want to pick them. This is a nice way to help the hitch hiker community even if them don’t use Waze.

there would need to be logic to recognize one car is not 'increased traffic' in the lane

GPS polling would need be reduced for those vehicles not capable of accommodating multiple charging leads.

It would be simpler for those not fond of personal transportation to cherish their respective warm-fuzzy for carpooling :P

If there are two or more active waze clients in the same car, then you should get a points multiplier, perhaps 2x. This would give wazers an incentive to carpool and help reduce the number of cars on the road. It could also help waze improve the quality of it's GPS recording, since they would be able to average the two different GPS receivers from each phone.