Washington ? With a final decision about storing nuclear waste in Nevada due next month, an environmental group hopes to make an 11th-hour issue out of how the waste will get there.

Unveiling a new Web site today, the Environmental Working Group has made it possible for Americans to map the routes with a mouse click or two.

“People are starting to focus on how we get from here to there, which is not some ‘Star Trek’ beaming technology, but on trucks and railroads,” said Ken Cook, executive director of the small, nonprofit Washington-based group.

Called www.mapscience.org, the site will allow users to log on and type in an address. A tricolor map then will appear depicting the closest highway and rail routes near the address that could be used to ferry waste to Yucca Mountain, Nev. The routes within dark orange areas show locations within one mile, pale orange within two miles, and yellow within five miles.

The maps also will show schools and churches, and other information, including state numbers on fatalities involving tractor-trailers, train wrecks and projected nuclear waste shipments through the life of the project.

The group drew upon data about proposed transportation routes from the Department of Energy’s environmental impact statement on Yucca Mountain.

Nearly 100 million pounds of radioactive nuclear waste are stored in temporary sites in 39 states. The Bush administration wants to bury 77,000 tons of the waste at Yucca Mountain over a 24-year period, beginning in 2010. Once all approvals and licensing are in place, shipments would go through 43 states, at a rate of about 175 a year, Energy Department spokesman Joe Davis said.