Southwest Washington lawmakers have received a sneak peek of construction sequencing for the Columbia River Crossing — a look that for some of them raised more questions than answers about traffic, timing and financing.

A new map presented to the Southwest Washington Regional Transportation Council by CRC Director Nancy Boyd last week shows a timeline of which tasks will be tackled first.

Plans show the CRC starting with a new Interstate 5 bridge and light rail. The cost is expected to be $2.05 billion and construction will last at least six years. The rest of the work — including three interchanges in Vancouver and the bulk of the work on Hayden Island — will span the next seven or more years.

The phasing, Boyd said, more accurately represents the incremental way that money will flow from the states and federal government.

But just when the construction is set to start isn’t clear. Project documents still show 2013 as the start date, a figure that Boyd told the group March 22 is not correct.