These Bluetoth speakerphones can typically be mounted on the visor above your head, while some systems integrate with your car's stereo system or clip to the rearview mirror.
Hang tags designed to hold your pass can be hung from the rearview mirror, or the pass itself can be displayed on the dashboard of your vehicle with the signature side showing.
Adjust the rearview mirror so you can see well out the back window.
In addition, look for those that offer power sliding doors and rearview cameras as well.
The small car fishtailed around a curve, but she kept up the pace until she no longer saw the man in her rearview mirror.