advance(/pass/go ahead) unimpeded; drive (/go) straight without obstruction; have free access to; the line is clear (/open); proceed without hindrance
? 鏟除這兩方面的禍根，才能使黨在團(tuán)結(jié)全黨同志和團(tuán)結(jié)全國人民的偉大事業(yè)中～。(《毛澤東選集》 136) Only by uprooting this evil in both its aspects can the Party advance unimpeded in its great task of achieving unity among all Party comrades and among all the people of our country.
? 早等候在這里的日本軍官，……他拿出了一件日本軍大衣和軍帽，把我迅速打扮了一下，然后和吉田一同陪我坐上一部日軍司令部的軍車。這部車在白河岸上～，一直開到一個(gè)碼頭。(愛新覺羅·溥儀 《我的前半生》 288)Here another Japanese officer was waiting and he produced a Japanese army greatcoat and cap which he put on me. He then accompanied me and the interpreter in a Japanese military car which drove straight to a dock on the bank of the Bai River without obstruction.
暢行無阻
go unimpeded;without hindrance (or obstruction)
車輛～。The traffic proceeds without hindrance./政令～。The government decrees are carried out without obstruction.
暢行無阻行（通）chànɡ xínɡ wú zǔ
毫無阻礙地通過。pass unimpeded, have free access to, without let or hindrance, advance unimpeded