Current Cape Cod Traffic Report
From inside Massachusetts, dial 511 on your mobile phone.
From outside Massachusetts, or from a landline anywhere, dial:
(617) 986-5511 or
(508) 499-5511 or
After the prompts, press the route number you'll be traveling:
Routes coming onto Cape Cod
Routes leaving Cape Cod
Note: There's no extra charge to call 511 from your mobile device in Massachusetts. Your normal mobile charges (if any) will apply, just as they would with any other call you make.
For regional traffic reports, I like Boston radio station WBZ 1030-AM for their "Traffic on The 3s". (Every ten minutes, e.g. 10:03, 10:13, 10:23, 10:33, etc.)
1030-AM's reports cover all the major roads leading to Cape Cod from Boston and the North Shore, as well as from Western and Central Massachusetts.
That includes: the Massachusetts Turnpike (Rt. 90), I-93, I-495, Rt. 3, Rt. 25, and the Bourne and Sagamore bridges.
For local road and bridge conditions here on the Cape, we tune to WQRC 99.9-FM, a Hyannis-based radio station, for hourly (in-season) traffic reports.