Transport struggles linger for Myanmar aid workers

(CNN) - Although Myanmar's military junta has begun to let international aid workers to travel into the cyclone-ravaged Irrawaddy Delta, logistical challenges have kept help from reaching about half of the affected regions, relief agencies reported Friday.

Workers for the U.N. children's agency UNICEF have had no trouble with Myanmar officials, UNICEF spokesman Mike Bociurkiw said. They've reached "far-flung areas," but they must travel many hours by boat since most roads and bridges were left impassable when Cyclone Nargis roared across Myanmar four weeks ago, Bociurkiw said.

And Chris Webster, a spokesman for the Christian charity World Vision, said his agency has seen "an opening up" by Myanmar officials since U.N. Secretary-General Ban Ki-moon visited the country last week.

"We are getting access," Webster said. "Of course, it will need to be tested over a longer period with more aid, more supplies and more staff, but it does appear things are opening up."