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Yes it does. I have a 2557 LMT as well. Much better coverage and a lot more traffic updates
Sorry, there was a problem. Please try again later.The GTM60 will give you more detail (such as if there is an accident, construction, road closure) as well as a faster refresh rate for the traffic information. This means that it will give more up to date information than the traffic that comes with the nuvi 2557LMT. For a full comparison, please visit the support section of the Garmin website and perform a search for "What is the difference between HD Digital Traffic, Live Traffic, and Garmin Traffic on my North American device?".
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