
Originally Posted by
Breeze
As I work at the Auto Road Tollhouse in season, I'd like to chime in.
None of the MANY hybrids that have made the trip to the summit have had a problem on the upbound ride, nor have we heard any stories of electronics problems at the summit caused by microwave or other interference.
I will caution that we flagged out the Hybrid Synergy Drive Toyotas for a week or so last summer because of POSSIBLE downbound issues. Auto Road staff got an HSD Highlander and an HSD Camry on loan for an "experienced driver's" trial on the road and a special handout was created for Toyota drivers with the Hybrid Synergy Drive system.
With any CVT system , essentially there is no automatic or manual transmission downshift capability. Combine that with the Hybrid Drive, the only option is to select the B ( braking) option, which places all the braking force needed squarely on the braking system. It is all too possible to come DOWN the AR quicker than advisable, and meet the age old ( common) enemy of overheated brakes, so now we just caution to be aware of overheating brakes ( and it is really Same Old Same Old Stuff).
Your car isn't smarter, no matter what you think or have been told. Be truly careful. Driver is totally tasked to maintain safety and awareness
Yes, you'll maximize regenerative braking energy coming down, but the brakes are still disc brakes you are tasking and nothing about them is hugely different from a non hybrid car with a REAL transmission--- a CVT transmission is just not the help you'd get from Automatic Low or Manual 1st/2nd.
Its totally doable, not dangerous, just requires that you keep your mindset on your brake temperatures and driving safety, not on your gas mileage or green rebate $$. There are lots of stops on the way down Mt Washington Auto Road, many of them have impressive lookouts and/or short walks to take in more of the scenery. See it, experience it, and stay safe.
How hot can your brakes get while descending Mt Washington??
Hot enough to totally fail ( the only auto fatality on the AR <1984> was from brake failure downbound on the last mile of lower mountain. )
Hot enough to melt your hubcaps off...
Chevy Lumina and Ford Focus cars ( the budget rental fleet favorites) routinely throw their plastic hubcaps on the last mile downbound. Brake heat melts the plastic hubcap clips and the hubcaps simply fall off, littering the woods. At times we actually get the ALL 4 ONE Visual Comedy ( WTF???? LOLOL !!!!!) of all 4 hubcaps falling off the same vehicle at the same time at the gas pump at the bottom of the mountain.
Cars don't navigate the Auto Road, its all about the driver.
Breeze