There is no magic mic that will eliminate street noise. That’s not a sound problem, it’s a location issue. What are you connecting the lav mic to? A good all around mic would be the Countryman EMW at around $200 or so. You’ll need a windscreen to eliminate some wind sounds or you can bury the mic under clothing to shield it.
OTOH for outdoor interviews nothing beats the Electrovoice RE50, the standard in hand held on camera mics.
Eric